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for-5.8/block-2020-06-01 

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Merge tag 'for-5.8/block-2020-06-01' of git://git.kernel.dk/linux-block

Pull block updates from Jens Axboe:
 "Core block changes that have been queued up for this release:

   - Remove dead blk-throttle and blk-wbt code (Guoqing)

   - Include pid in blktrace note traces (Jan)

   - Don't spew I/O errors on wouldblock termination (me)

   - Zone append addition (Johannes, Keith, Damien)

   - IO accounting improvements (Konstantin, Christoph)

   - blk-mq hardware map update improvements (Ming)

   - Scheduler dispatch improvement (Salman)

   - Inline block encryption support (Satya)

   - Request map fixes and improvements (Weiping)

   - blk-iocost tweaks (Tejun)

   - Fix for timeout failing with error injection (Keith)

   - Queue re-run fixes (Douglas)

   - CPU hotplug improvements (Christoph)

   - Queue entry/exit improvements (Christoph)

   - Move DMA drain handling to the few drivers that use it (Christoph)

   - Partition handling cleanups (Christoph)"

* tag 'for-5.8/block-2020-06-01' of git://git.kernel.dk/linux-block: (127 commits)
  block: mark bio_wouldblock_error() bio with BIO_QUIET
  blk-wbt: rename __wbt_update_limits to wbt_update_limits
  blk-wbt: remove wbt_update_limits
  blk-throttle: remove tg_drain_bios
  blk-throttle: remove blk_throtl_drain
  null_blk: force complete for timeout request
  blk-mq: drain I/O when all CPUs in a hctx are offline
  blk-mq: add blk_mq_all_tag_iter
  blk-mq: open code __blk_mq_alloc_request in blk_mq_alloc_request_hctx
  blk-mq: use BLK_MQ_NO_TAG in more places
  blk-mq: rename BLK_MQ_TAG_FAIL to BLK_MQ_NO_TAG
  blk-mq: move more request initialization to blk_mq_rq_ctx_init
  blk-mq: simplify the blk_mq_get_request calling convention
  blk-mq: remove the bio argument to ->prepare_request
  nvme: force complete cancelled requests
  blk-mq: blk-mq: provide forced completion method
  block: fix a warning when blkdev.h is included for !CONFIG_BLOCK builds
  block: blk-crypto-fallback: remove redundant initialization of variable err
  block: reduce part_stat_lock() scope
  block: use __this_cpu_add() instead of access by smp_processor_id()
  ...
This commit is contained in:
Linus Torvalds 2020-06-02 15:29:19 -07:00
parent 1966391fa5 abb30460bd
commit 750a02ab8d
122 changed files with 4514 additions and 1493 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
Documentation/block/index.rst
View File

@ -14,6 +14,7 @@ Block
cmdline-partition
data-integrity
deadline-iosched
inline-encryption
ioprio
kyber-iosched
null_blk

263
Documentation/block/inline-encryption.rst Normal file
View File

@ -0,0 +1,263 @@
.. SPDX-License-Identifier: GPL-2.0
=================
Inline Encryption
=================
Background
==========
Inline encryption hardware sits logically between memory and the disk, and can
en/decrypt data as it goes in/out of the disk. Inline encryption hardware has a
fixed number of "keyslots" - slots into which encryption contexts (i.e. the
encryption key, encryption algorithm, data unit size) can be programmed by the
kernel at any time. Each request sent to the disk can be tagged with the index
of a keyslot (and also a data unit number to act as an encryption tweak), and
the inline encryption hardware will en/decrypt the data in the request with the
encryption context programmed into that keyslot. This is very different from
full disk encryption solutions like self encrypting drives/TCG OPAL/ATA
Security standards, since with inline encryption, any block on disk could be
encrypted with any encryption context the kernel chooses.
Objective
=========
We want to support inline encryption (IE) in the kernel.
To allow for testing, we also want a crypto API fallback when actual
IE hardware is absent. We also want IE to work with layered devices
like dm and loopback (i.e. we want to be able to use the IE hardware
of the underlying devices if present, or else fall back to crypto API
en/decryption).
Constraints and notes
=====================
- IE hardware has a limited number of "keyslots" that can be programmed
with an encryption context (key, algorithm, data unit size, etc.) at any time.
One can specify a keyslot in a data request made to the device, and the
device will en/decrypt the data using the encryption context programmed into
that specified keyslot. When possible, we want to make multiple requests with
the same encryption context share the same keyslot.
- We need a way for upper layers like filesystems to specify an encryption
context to use for en/decrypting a struct bio, and a device driver (like UFS)
needs to be able to use that encryption context when it processes the bio.
- We need a way for device drivers to expose their inline encryption
capabilities in a unified way to the upper layers.
Design
======
We add a :c:type:`struct bio_crypt_ctx` to :c:type:`struct bio` that can
represent an encryption context, because we need to be able to pass this
encryption context from the upper layers (like the fs layer) to the
device driver to act upon.
While IE hardware works on the notion of keyslots, the FS layer has no
knowledge of keyslots - it simply wants to specify an encryption context to
use while en/decrypting a bio.
We introduce a keyslot manager (KSM) that handles the translation from
encryption contexts specified by the FS to keyslots on the IE hardware.
This KSM also serves as the way IE hardware can expose its capabilities to
upper layers. The generic mode of operation is: each device driver that wants
to support IE will construct a KSM and set it up in its struct request_queue.
Upper layers that want to use IE on this device can then use this KSM in
the device's struct request_queue to translate an encryption context into
a keyslot. The presence of the KSM in the request queue shall be used to mean
that the device supports IE.
The KSM uses refcounts to track which keyslots are idle (either they have no
encryption context programmed, or there are no in-flight struct bios
referencing that keyslot). When a new encryption context needs a keyslot, it
tries to find a keyslot that has already been programmed with the same
encryption context, and if there is no such keyslot, it evicts the least
recently used idle keyslot and programs the new encryption context into that
one. If no idle keyslots are available, then the caller will sleep until there
is at least one.
blk-mq changes, other block layer changes and blk-crypto-fallback
=================================================================
We add a pointer to a ``bi_crypt_context`` and ``keyslot`` to
:c:type:`struct request`. These will be referred to as the ``crypto fields``
for the request. This ``keyslot`` is the keyslot into which the
``bi_crypt_context`` has been programmed in the KSM of the ``request_queue``
that this request is being sent to.
We introduce ``block/blk-crypto-fallback.c``, which allows upper layers to remain
blissfully unaware of whether or not real inline encryption hardware is present
underneath. When a bio is submitted with a target ``request_queue`` that doesn't
support the encryption context specified with the bio, the block layer will
en/decrypt the bio with the blk-crypto-fallback.
If the bio is a ``WRITE`` bio, a bounce bio is allocated, and the data in the bio
is encrypted stored in the bounce bio - blk-mq will then proceed to process the
bounce bio as if it were not encrypted at all (except when blk-integrity is
concerned). ``blk-crypto-fallback`` sets the bounce bio's ``bi_end_io`` to an
internal function that cleans up the bounce bio and ends the original bio.
If the bio is a ``READ`` bio, the bio's ``bi_end_io`` (and also ``bi_private``)
is saved and overwritten by ``blk-crypto-fallback`` to
``bio_crypto_fallback_decrypt_bio``. The bio's ``bi_crypt_context`` is also
overwritten with ``NULL``, so that to the rest of the stack, the bio looks
as if it was a regular bio that never had an encryption context specified.
``bio_crypto_fallback_decrypt_bio`` will decrypt the bio, restore the original
``bi_end_io`` (and also ``bi_private``) and end the bio again.
Regardless of whether real inline encryption hardware is used or the
blk-crypto-fallback is used, the ciphertext written to disk (and hence the
on-disk format of data) will be the same (assuming the hardware's implementation
of the algorithm being used adheres to spec and functions correctly).
If a ``request queue``'s inline encryption hardware claimed to support the
encryption context specified with a bio, then it will not be handled by the
``blk-crypto-fallback``. We will eventually reach a point in blk-mq when a
:c:type:`struct request` needs to be allocated for that bio. At that point,
blk-mq tries to program the encryption context into the ``request_queue``'s
keyslot_manager, and obtain a keyslot, which it stores in its newly added
``keyslot`` field. This keyslot is released when the request is completed.
When the first bio is added to a request, ``blk_crypto_rq_bio_prep`` is called,
which sets the request's ``crypt_ctx`` to a copy of the bio's
``bi_crypt_context``. bio_crypt_do_front_merge is called whenever a subsequent
bio is merged to the front of the request, which updates the ``crypt_ctx`` of
the request so that it matches the newly merged bio's ``bi_crypt_context``. In particular, the request keeps a copy of the ``bi_crypt_context`` of the first
bio in its bio-list (blk-mq needs to be careful to maintain this invariant
during bio and request merges).
To make it possible for inline encryption to work with request queue based
layered devices, when a request is cloned, its ``crypto fields`` are cloned as
well. When the cloned request is submitted, blk-mq programs the
``bi_crypt_context`` of the request into the clone's request_queue's keyslot
manager, and stores the returned keyslot in the clone's ``keyslot``.
API presented to users of the block layer
=========================================
``struct blk_crypto_key`` represents a crypto key (the raw key, size of the
key, the crypto algorithm to use, the data unit size to use, and the number of
bytes required to represent data unit numbers that will be specified with the
``bi_crypt_context``).
``blk_crypto_init_key`` allows upper layers to initialize such a
``blk_crypto_key``.
``bio_crypt_set_ctx`` should be called on any bio that a user of
the block layer wants en/decrypted via inline encryption (or the
blk-crypto-fallback, if hardware support isn't available for the desired
crypto configuration). This function takes the ``blk_crypto_key`` and the
data unit number (DUN) to use when en/decrypting the bio.
``blk_crypto_config_supported`` allows upper layers to query whether or not the
an encryption context passed to request queue can be handled by blk-crypto
(either by real inline encryption hardware, or by the blk-crypto-fallback).
This is useful e.g. when blk-crypto-fallback is disabled, and the upper layer
wants to use an algorithm that may not supported by hardware - this function
lets the upper layer know ahead of time that the algorithm isn't supported,
and the upper layer can fallback to something else if appropriate.
``blk_crypto_start_using_key`` - Upper layers must call this function on
``blk_crypto_key`` and a ``request_queue`` before using the key with any bio
headed for that ``request_queue``. This function ensures that either the
hardware supports the key's crypto settings, or the crypto API fallback has
transforms for the needed mode allocated and ready to go. Note that this
function may allocate an ``skcipher``, and must not be called from the data
path, since allocating ``skciphers`` from the data path can deadlock.
``blk_crypto_evict_key`` *must* be called by upper layers before a
``blk_crypto_key`` is freed. Further, it *must* only be called only once
there are no more in-flight requests that use that ``blk_crypto_key``.
``blk_crypto_evict_key`` will ensure that a key is removed from any keyslots in
inline encryption hardware that the key might have been programmed into (or the blk-crypto-fallback).
API presented to device drivers
===============================
A :c:type:``struct blk_keyslot_manager`` should be set up by device drivers in
the ``request_queue`` of the device. The device driver needs to call
``blk_ksm_init`` on the ``blk_keyslot_manager``, which specifying the number of
keyslots supported by the hardware.
The device driver also needs to tell the KSM how to actually manipulate the
IE hardware in the device to do things like programming the crypto key into
the IE hardware into a particular keyslot. All this is achieved through the
:c:type:`struct blk_ksm_ll_ops` field in the KSM that the device driver
must fill up after initing the ``blk_keyslot_manager``.
The KSM also handles runtime power management for the device when applicable
(e.g. when it wants to program a crypto key into the IE hardware, the device
must be runtime powered on) - so the device driver must also set the ``dev``
field in the ksm to point to the `struct device` for the KSM to use for runtime
power management.
``blk_ksm_reprogram_all_keys`` can be called by device drivers if the device
needs each and every of its keyslots to be reprogrammed with the key it
"should have" at the point in time when the function is called. This is useful
e.g. if a device loses all its keys on runtime power down/up.
``blk_ksm_destroy`` should be called to free up all resources used by a keyslot
manager upon ``blk_ksm_init``, once the ``blk_keyslot_manager`` is no longer
needed.
Layered Devices
===============
Request queue based layered devices like dm-rq that wish to support IE need to
create their own keyslot manager for their request queue, and expose whatever
functionality they choose. When a layered device wants to pass a clone of that
request to another ``request_queue``, blk-crypto will initialize and prepare the
clone as necessary - see ``blk_crypto_insert_cloned_request`` in
``blk-crypto.c``.
Future Optimizations for layered devices
========================================
Creating a keyslot manager for a layered device uses up memory for each
keyslot, and in general, a layered device merely passes the request on to a
"child" device, so the keyslots in the layered device itself are completely
unused, and don't need any refcounting or keyslot programming. We can instead
define a new type of KSM; the "passthrough KSM", that layered devices can use
to advertise an unlimited number of keyslots, and support for any encryption
algorithms they choose, while not actually using any memory for each keyslot.
Another use case for the "passthrough KSM" is for IE devices that do not have a
limited number of keyslots.
Interaction between inline encryption and blk integrity
=======================================================
At the time of this patch, there is no real hardware that supports both these
features. However, these features do interact with each other, and it's not
completely trivial to make them both work together properly. In particular,
when a WRITE bio wants to use inline encryption on a device that supports both
features, the bio will have an encryption context specified, after which
its integrity information is calculated (using the plaintext data, since
the encryption will happen while data is being written), and the data and
integrity info is sent to the device. Obviously, the integrity info must be
verified before the data is encrypted. After the data is encrypted, the device
must not store the integrity info that it received with the plaintext data
since that might reveal information about the plaintext data. As such, it must
re-generate the integrity info from the ciphertext data and store that on disk
instead. Another issue with storing the integrity info of the plaintext data is
that it changes the on disk format depending on whether hardware inline
encryption support is present or the kernel crypto API fallback is used (since
if the fallback is used, the device will receive the integrity info of the
ciphertext, not that of the plaintext).
Because there isn't any real hardware yet, it seems prudent to assume that
hardware implementations might not implement both features together correctly,
and disallow the combination for now. Whenever a device supports integrity, the
kernel will pretend that the device does not support hardware inline encryption
(by essentially setting the keyslot manager in the request_queue of the device
to NULL). When the crypto API fallback is enabled, this means that all bios with
and encryption context will use the fallback, and IO will complete as usual.
When the fallback is disabled, a bio with an encryption context will be failed.

18
block/Kconfig
View File

@ -146,6 +146,7 @@ config BLK_CGROUP_IOLATENCY
config BLK_CGROUP_IOCOST
bool "Enable support for cost model based cgroup IO controller"
depends on BLK_CGROUP=y
select BLK_RQ_IO_DATA_LEN
select BLK_RQ_ALLOC_TIME
---help---
Enabling this option enables the .weight interface for cost
@ -185,6 +186,23 @@ config BLK_SED_OPAL
Enabling this option enables users to setup/unlock/lock
Locking ranges for SED devices using the Opal protocol.
config BLK_INLINE_ENCRYPTION
bool "Enable inline encryption support in block layer"
help
Build the blk-crypto subsystem. Enabling this lets the
block layer handle encryption, so users can take
advantage of inline encryption hardware if present.
config BLK_INLINE_ENCRYPTION_FALLBACK
bool "Enable crypto API fallback for blk-crypto"
depends on BLK_INLINE_ENCRYPTION
select CRYPTO
select CRYPTO_SKCIPHER
help
Enabling this lets the block layer handle inline encryption
by falling back to the kernel crypto API when inline
encryption hardware is not present.
menu "Partition Types"
source "block/partitions/Kconfig"

2
block/Makefile
View File

@ -36,3 +36,5 @@ obj-$(CONFIG_BLK_DEBUG_FS) += blk-mq-debugfs.o
obj-$(CONFIG_BLK_DEBUG_FS_ZONED)+= blk-mq-debugfs-zoned.o
obj-$(CONFIG_BLK_SED_OPAL) += sed-opal.o
obj-$(CONFIG_BLK_PM) += blk-pm.o
obj-$(CONFIG_BLK_INLINE_ENCRYPTION) += keyslot-manager.o blk-crypto.o
obj-$(CONFIG_BLK_INLINE_ENCRYPTION_FALLBACK) += blk-crypto-fallback.o

2
block/bfq-iosched.c
View File

@ -6073,7 +6073,7 @@ static struct bfq_queue *bfq_get_bfqq_handle_split(struct bfq_data *bfqd,
* comments on bfq_init_rq for the reason behind this delayed
* preparation.
*/
static void bfq_prepare_request(struct request *rq, struct bio *bio)
static void bfq_prepare_request(struct request *rq)
{
/*
* Regardless of whether we have an icq attached, we have to

3
block/bio-integrity.c
View File

@ -42,6 +42,9 @@ struct bio_integrity_payload *bio_integrity_alloc(struct bio *bio,
struct bio_set *bs = bio->bi_pool;
unsigned inline_vecs;
if (WARN_ON_ONCE(bio_has_crypt_ctx(bio)))
return ERR_PTR(-EOPNOTSUPP);
if (!bs || !mempool_initialized(&bs->bio_integrity_pool)) {
bip = kmalloc(struct_size(bip, bip_inline_vecs, nr_vecs), gfp_mask);
inline_vecs = nr_vecs;

184
block/bio.c
View File

@ -18,6 +18,7 @@
#include <linux/blk-cgroup.h>
#include <linux/highmem.h>
#include <linux/sched/sysctl.h>
#include <linux/blk-crypto.h>
#include <trace/events/block.h>
#include "blk.h"
@ -237,6 +238,8 @@ void bio_uninit(struct bio *bio)
if (bio_integrity(bio))
bio_integrity_free(bio);
bio_crypt_free_ctx(bio);
}
EXPORT_SYMBOL(bio_uninit);
@ -708,6 +711,8 @@ struct bio *bio_clone_fast(struct bio *bio, gfp_t gfp_mask, struct bio_set *bs)
__bio_clone_fast(b, bio);
bio_crypt_clone(b, bio, gfp_mask);
if (bio_integrity(bio)) {
int ret;
@ -748,9 +753,14 @@ static inline bool page_is_mergeable(const struct bio_vec *bv,
return true;
}
static bool bio_try_merge_pc_page(struct request_queue *q, struct bio *bio,
struct page *page, unsigned len, unsigned offset,
bool *same_page)
/*
* Try to merge a page into a segment, while obeying the hardware segment
* size limit. This is not for normal read/write bios, but for passthrough
* or Zone Append operations that we can't split.
*/
static bool bio_try_merge_hw_seg(struct request_queue *q, struct bio *bio,
struct page *page, unsigned len,
unsigned offset, bool *same_page)
{
struct bio_vec *bv = &bio->bi_io_vec[bio->bi_vcnt - 1];
unsigned long mask = queue_segment_boundary(q);
@ -765,38 +775,32 @@ static bool bio_try_merge_pc_page(struct request_queue *q, struct bio *bio,
}
/**
* __bio_add_pc_page - attempt to add page to passthrough bio
* @q: the target queue
* @bio: destination bio
* @page: page to add
* @len: vec entry length
* @offset: vec entry offset
* @same_page: return if the merge happen inside the same page
* bio_add_hw_page - attempt to add a page to a bio with hw constraints
* @q: the target queue
* @bio: destination bio
* @page: page to add
* @len: vec entry length
* @offset: vec entry offset
* @max_sectors: maximum number of sectors that can be added
* @same_page: return if the segment has been merged inside the same page
*
* Attempt to add a page to the bio_vec maplist. This can fail for a
* number of reasons, such as the bio being full or target block device
* limitations. The target block device must allow bio's up to PAGE_SIZE,
* so it is always possible to add a single page to an empty bio.
*
* This should only be used by passthrough bios.
* Add a page to a bio while respecting the hardware max_sectors, max_segment
* and gap limitations.
*/
int __bio_add_pc_page(struct request_queue *q, struct bio *bio,
int bio_add_hw_page(struct request_queue *q, struct bio *bio,
struct page *page, unsigned int len, unsigned int offset,
bool *same_page)
unsigned int max_sectors, bool *same_page)
{
struct bio_vec *bvec;
/*
* cloned bio must not modify vec list
*/
if (unlikely(bio_flagged(bio, BIO_CLONED)))
if (WARN_ON_ONCE(bio_flagged(bio, BIO_CLONED)))
return 0;
if (((bio->bi_iter.bi_size + len) >> 9) > queue_max_hw_sectors(q))
if (((bio->bi_iter.bi_size + len) >> 9) > max_sectors)
return 0;
if (bio->bi_vcnt > 0) {
if (bio_try_merge_pc_page(q, bio, page, len, offset, same_page))
if (bio_try_merge_hw_seg(q, bio, page, len, offset, same_page))
return len;
/*
@ -823,11 +827,27 @@ int __bio_add_pc_page(struct request_queue *q, struct bio *bio,
return len;
}
/**
* bio_add_pc_page - attempt to add page to passthrough bio
* @q: the target queue
* @bio: destination bio
* @page: page to add
* @len: vec entry length
* @offset: vec entry offset
*
* Attempt to add a page to the bio_vec maplist. This can fail for a
* number of reasons, such as the bio being full or target block device
* limitations. The target block device must allow bio's up to PAGE_SIZE,
* so it is always possible to add a single page to an empty bio.
*
* This should only be used by passthrough bios.
*/
int bio_add_pc_page(struct request_queue *q, struct bio *bio,
struct page *page, unsigned int len, unsigned int offset)
{
bool same_page = false;
return __bio_add_pc_page(q, bio, page, len, offset, &same_page);
return bio_add_hw_page(q, bio, page, len, offset,
queue_max_hw_sectors(q), &same_page);
}
EXPORT_SYMBOL(bio_add_pc_page);
@ -936,6 +956,7 @@ void bio_release_pages(struct bio *bio, bool mark_dirty)
put_page(bvec->bv_page);
}
}
EXPORT_SYMBOL_GPL(bio_release_pages);
static int __bio_iov_bvec_add_pages(struct bio *bio, struct iov_iter *iter)
{
@ -1010,6 +1031,50 @@ static int __bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter)
return 0;
}
static int __bio_iov_append_get_pages(struct bio *bio, struct iov_iter *iter)
{
unsigned short nr_pages = bio->bi_max_vecs - bio->bi_vcnt;
unsigned short entries_left = bio->bi_max_vecs - bio->bi_vcnt;
struct request_queue *q = bio->bi_disk->queue;
unsigned int max_append_sectors = queue_max_zone_append_sectors(q);
struct bio_vec *bv = bio->bi_io_vec + bio->bi_vcnt;
struct page **pages = (struct page **)bv;
ssize_t size, left;
unsigned len, i;
size_t offset;
if (WARN_ON_ONCE(!max_append_sectors))
return 0;
/*
* Move page array up in the allocated memory for the bio vecs as far as
* possible so that we can start filling biovecs from the beginning
* without overwriting the temporary page array.
*/
BUILD_BUG_ON(PAGE_PTRS_PER_BVEC < 2);
pages += entries_left * (PAGE_PTRS_PER_BVEC - 1);
size = iov_iter_get_pages(iter, pages, LONG_MAX, nr_pages, &offset);
if (unlikely(size <= 0))
return size ? size : -EFAULT;
for (left = size, i = 0; left > 0; left -= len, i++) {
struct page *page = pages[i];
bool same_page = false;
len = min_t(size_t, PAGE_SIZE - offset, left);
if (bio_add_hw_page(q, bio, page, len, offset,
max_append_sectors, &same_page) != len)
return -EINVAL;
if (same_page)
put_page(page);
offset = 0;
}
iov_iter_advance(iter, size);
return 0;
}
/**
* bio_iov_iter_get_pages - add user or kernel pages to a bio
* @bio: bio to add pages to
@ -1039,16 +1104,23 @@ int bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter)
return -EINVAL;
do {
if (is_bvec)
ret = __bio_iov_bvec_add_pages(bio, iter);
else
ret = __bio_iov_iter_get_pages(bio, iter);
if (bio_op(bio) == REQ_OP_ZONE_APPEND) {
if (WARN_ON_ONCE(is_bvec))
return -EINVAL;
ret = __bio_iov_append_get_pages(bio, iter);
} else {
if (is_bvec)
ret = __bio_iov_bvec_add_pages(bio, iter);
else
ret = __bio_iov_iter_get_pages(bio, iter);
}
} while (!ret && iov_iter_count(iter) && !bio_full(bio, 0));
if (is_bvec)
bio_set_flag(bio, BIO_NO_PAGE_REF);
return bio->bi_vcnt ? 0 : ret;
}
EXPORT_SYMBOL_GPL(bio_iov_iter_get_pages);
static void submit_bio_wait_endio(struct bio *bio)
{
@ -1105,6 +1177,7 @@ void bio_advance(struct bio *bio, unsigned bytes)
if (bio_integrity(bio))
bio_integrity_advance(bio, bytes);
bio_crypt_advance(bio, bytes);
bio_advance_iter(bio, &bio->bi_iter, bytes);
}
EXPORT_SYMBOL(bio_advance);
@ -1303,55 +1376,6 @@ defer:
schedule_work(&bio_dirty_work);
}
void update_io_ticks(struct hd_struct *part, unsigned long now, bool end)
{
unsigned long stamp;
again:
stamp = READ_ONCE(part->stamp);
if (unlikely(stamp != now)) {
if (likely(cmpxchg(&part->stamp, stamp, now) == stamp)) {
__part_stat_add(part, io_ticks, end ? now - stamp : 1);
}
}
if (part->partno) {
part = &part_to_disk(part)->part0;
goto again;
}
}
void generic_start_io_acct(struct request_queue *q, int op,
unsigned long sectors, struct hd_struct *part)
{
const int sgrp = op_stat_group(op);
part_stat_lock();
update_io_ticks(part, jiffies, false);
part_stat_inc(part, ios[sgrp]);
part_stat_add(part, sectors[sgrp], sectors);
part_inc_in_flight(q, part, op_is_write(op));
part_stat_unlock();
}
EXPORT_SYMBOL(generic_start_io_acct);
void generic_end_io_acct(struct request_queue *q, int req_op,
struct hd_struct *part, unsigned long start_time)
{
unsigned long now = jiffies;
unsigned long duration = now - start_time;
const int sgrp = op_stat_group(req_op);
part_stat_lock();
update_io_ticks(part, now, true);
part_stat_add(part, nsecs[sgrp], jiffies_to_nsecs(duration));
part_dec_in_flight(q, part, op_is_write(req_op));
part_stat_unlock();
}
EXPORT_SYMBOL(generic_end_io_acct);
static inline bool bio_remaining_done(struct bio *bio)
{
/*
@ -1445,6 +1469,10 @@ struct bio *bio_split(struct bio *bio, int sectors,
BUG_ON(sectors <= 0);
BUG_ON(sectors >= bio_sectors(bio));
/* Zone append commands cannot be split */
if (WARN_ON_ONCE(bio_op(bio) == REQ_OP_ZONE_APPEND))
return NULL;
split = bio_clone_fast(bio, gfp, bs);
if (!split)
return NULL;

6
block/blk-cgroup.c
View File

@ -1530,6 +1530,10 @@ static void blkcg_scale_delay(struct blkcg_gq *blkg, u64 now)
{
u64 old = atomic64_read(&blkg->delay_start);
/* negative use_delay means no scaling, see blkcg_set_delay() */
if (atomic_read(&blkg->use_delay) < 0)
return;
/*
* We only want to scale down every second. The idea here is that we
* want to delay people for min(delay_nsec, NSEC_PER_SEC) in a certain
@ -1717,6 +1721,8 @@ void blkcg_schedule_throttle(struct request_queue *q, bool use_memdelay)
*/
void blkcg_add_delay(struct blkcg_gq *blkg, u64 now, u64 delta)
{
if (WARN_ON_ONCE(atomic_read(&blkg->use_delay) < 0))
return;
blkcg_scale_delay(blkg, now);
atomic64_add(delta, &blkg->delay_nsec);
}

335
block/blk-core.c
View File

@ -39,6 +39,8 @@
#include <linux/debugfs.h>
#include <linux/bpf.h>
#include <linux/psi.h>
#include <linux/sched/sysctl.h>
#include <linux/blk-crypto.h>
#define CREATE_TRACE_POINTS
#include <trace/events/block.h>
@ -121,6 +123,7 @@ void blk_rq_init(struct request_queue *q, struct request *rq)
rq->start_time_ns = ktime_get_ns();
rq->part = NULL;
refcount_set(&rq->ref, 1);
blk_crypto_rq_set_defaults(rq);
}
EXPORT_SYMBOL(blk_rq_init);
@ -136,6 +139,7 @@ static const char *const blk_op_name[] = {
REQ_OP_NAME(ZONE_OPEN),
REQ_OP_NAME(ZONE_CLOSE),
REQ_OP_NAME(ZONE_FINISH),
REQ_OP_NAME(ZONE_APPEND),
REQ_OP_NAME(WRITE_SAME),
REQ_OP_NAME(WRITE_ZEROES),
REQ_OP_NAME(SCSI_IN),
@ -241,6 +245,17 @@ static void req_bio_endio(struct request *rq, struct bio *bio,
bio_advance(bio, nbytes);
if (req_op(rq) == REQ_OP_ZONE_APPEND && error == BLK_STS_OK) {
/*
* Partial zone append completions cannot be supported as the
* BIO fragments may end up not being written sequentially.
*/
if (bio->bi_iter.bi_size)
bio->bi_status = BLK_STS_IOERR;
else
bio->bi_iter.bi_sector = rq->__sector;
}
/* don't actually finish bio if it's part of flush sequence */
if (bio->bi_iter.bi_size == 0 && !(rq->rq_flags & RQF_FLUSH_SEQ))
bio_endio(bio);
@ -441,6 +456,23 @@ int blk_queue_enter(struct request_queue *q, blk_mq_req_flags_t flags)
}
}
static inline int bio_queue_enter(struct bio *bio)
{
struct request_queue *q = bio->bi_disk->queue;
bool nowait = bio->bi_opf & REQ_NOWAIT;
int ret;
ret = blk_queue_enter(q, nowait ? BLK_MQ_REQ_NOWAIT : 0);
if (unlikely(ret)) {
if (nowait && !blk_queue_dying(q))
bio_wouldblock_error(bio);
else
bio_io_error(bio);
}
return ret;
}
void blk_queue_exit(struct request_queue *q)
{
percpu_ref_put(&q->q_usage_counter);
@ -485,7 +517,7 @@ struct request_queue *__blk_alloc_queue(int node_id)
if (ret)
goto fail_id;
q->backing_dev_info = bdi_alloc_node(GFP_KERNEL, node_id);
q->backing_dev_info = bdi_alloc(node_id);
if (!q->backing_dev_info)
goto fail_split;
@ -495,7 +527,6 @@ struct request_queue *__blk_alloc_queue(int node_id)
q->backing_dev_info->ra_pages = VM_READAHEAD_PAGES;
q->backing_dev_info->capabilities = BDI_CAP_CGROUP_WRITEBACK;
q->backing_dev_info->name = "block";
q->node = node_id;
timer_setup(&q->backing_dev_info->laptop_mode_wb_timer,
@ -606,6 +637,16 @@ void blk_put_request(struct request *req)
}
EXPORT_SYMBOL(blk_put_request);
static void blk_account_io_merge_bio(struct request *req)
{
if (!blk_do_io_stat(req))
return;
part_stat_lock();
part_stat_inc(req->part, merges[op_stat_group(req_op(req))]);
part_stat_unlock();
}
bool bio_attempt_back_merge(struct request *req, struct bio *bio,
unsigned int nr_segs)
{
@ -624,7 +665,9 @@ bool bio_attempt_back_merge(struct request *req, struct bio *bio,
req->biotail = bio;
req->__data_len += bio->bi_iter.bi_size;
blk_account_io_start(req, false);
bio_crypt_free_ctx(bio);
blk_account_io_merge_bio(req);
return true;
}
@ -648,7 +691,9 @@ bool bio_attempt_front_merge(struct request *req, struct bio *bio,
req->__sector = bio->bi_iter.bi_sector;
req->__data_len += bio->bi_iter.bi_size;
blk_account_io_start(req, false);
bio_crypt_do_front_merge(req, bio);
blk_account_io_merge_bio(req);
return true;
}
@ -670,7 +715,7 @@ bool bio_attempt_discard_merge(struct request_queue *q, struct request *req,
req->__data_len += bio->bi_iter.bi_size;
req->nr_phys_segments = segments + 1;
blk_account_io_start(req, false);
blk_account_io_merge_bio(req);
return true;
no_merge:
req_set_nomerge(q, req);
@ -872,6 +917,41 @@ out:
return ret;
}
/*
* Check write append to a zoned block device.
*/
static inline blk_status_t blk_check_zone_append(struct request_queue *q,
struct bio *bio)
{
sector_t pos = bio->bi_iter.bi_sector;
int nr_sectors = bio_sectors(bio);
/* Only applicable to zoned block devices */
if (!blk_queue_is_zoned(q))
return BLK_STS_NOTSUPP;
/* The bio sector must point to the start of a sequential zone */
if (pos & (blk_queue_zone_sectors(q) - 1) ||
!blk_queue_zone_is_seq(q, pos))
return BLK_STS_IOERR;
/*
* Not allowed to cross zone boundaries. Otherwise, the BIO will be
* split and could result in non-contiguous sectors being written in
* different zones.
*/
if (nr_sectors > q->limits.chunk_sectors)
return BLK_STS_IOERR;
/* Make sure the BIO is small enough and will not get split */
if (nr_sectors > q->limits.max_zone_append_sectors)
return BLK_STS_IOERR;
bio->bi_opf |= REQ_NOMERGE;
return BLK_STS_OK;
}
static noinline_for_stack bool
generic_make_request_checks(struct bio *bio)
{
@ -941,6 +1021,11 @@ generic_make_request_checks(struct bio *bio)
if (!q->limits.max_write_same_sectors)
goto not_supported;
break;
case REQ_OP_ZONE_APPEND:
status = blk_check_zone_append(q, bio);
if (status != BLK_STS_OK)
goto end_io;
break;
case REQ_OP_ZONE_RESET:
case REQ_OP_ZONE_OPEN:
case REQ_OP_ZONE_CLOSE:
@ -961,12 +1046,13 @@ generic_make_request_checks(struct bio *bio)
}
/*
* Various block parts want %current->io_context and lazy ioc
* allocation ends up trading a lot of pain for a small amount of
* memory. Just allocate it upfront. This may fail and block
* layer knows how to live with it.
* Various block parts want %current->io_context, so allocate it up
* front rather than dealing with lots of pain to allocate it only
* where needed. This may fail and the block layer knows how to live
* with it.
*/
create_io_context(GFP_ATOMIC, q->node);
if (unlikely(!current->io_context))
create_task_io_context(current, GFP_ATOMIC, q->node);
if (!blkcg_bio_issue_check(q, bio))
return false;
@ -988,29 +1074,28 @@ end_io:
return false;
}
static blk_qc_t do_make_request(struct bio *bio)
{
struct request_queue *q = bio->bi_disk->queue;
blk_qc_t ret = BLK_QC_T_NONE;
if (blk_crypto_bio_prep(&bio)) {
if (!q->make_request_fn)
return blk_mq_make_request(q, bio);
ret = q->make_request_fn(q, bio);
}
blk_queue_exit(q);
return ret;
}
/**
* generic_make_request - hand a buffer to its device driver for I/O
* generic_make_request - re-submit a bio to the block device layer for I/O
* @bio: The bio describing the location in memory and on the device.
*
* generic_make_request() is used to make I/O requests of block
* devices. It is passed a &struct bio, which describes the I/O that needs
* to be done.
*
* generic_make_request() does not return any status. The
* success/failure status of the request, along with notification of
* completion, is delivered asynchronously through the bio->bi_end_io
* function described (one day) else where.
*
* The caller of generic_make_request must make sure that bi_io_vec
* are set to describe the memory buffer, and that bi_dev and bi_sector are
* set to describe the device address, and the
* bi_end_io and optionally bi_private are set to describe how
* completion notification should be signaled.
*
* generic_make_request and the drivers it calls may use bi_next if this
* bio happens to be merged with someone else, and may resubmit the bio to
* a lower device by calling into generic_make_request recursively, which
* means the bio should NOT be touched after the call to ->make_request_fn.
* This is a version of submit_bio() that shall only be used for I/O that is
* resubmitted to lower level drivers by stacking block drivers. All file
* systems and other upper level users of the block layer should use
* submit_bio() instead.
*/
blk_qc_t generic_make_request(struct bio *bio)
{
@ -1061,18 +1146,14 @@ blk_qc_t generic_make_request(struct bio *bio)
current->bio_list = bio_list_on_stack;
do {
struct request_queue *q = bio->bi_disk->queue;
blk_mq_req_flags_t flags = bio->bi_opf & REQ_NOWAIT ?
BLK_MQ_REQ_NOWAIT : 0;
if (likely(blk_queue_enter(q, flags) == 0)) {
if (likely(bio_queue_enter(bio) == 0)) {
struct bio_list lower, same;
/* Create a fresh bio_list for all subordinate requests */
bio_list_on_stack[1] = bio_list_on_stack[0];
bio_list_init(&bio_list_on_stack[0]);
ret = q->make_request_fn(q, bio);
blk_queue_exit(q);
ret = do_make_request(bio);
/* sort new bios into those for a lower level
* and those for the same level
@ -1088,12 +1169,6 @@ blk_qc_t generic_make_request(struct bio *bio)
bio_list_merge(&bio_list_on_stack[0], &lower);
bio_list_merge(&bio_list_on_stack[0], &same);
bio_list_merge(&bio_list_on_stack[0], &bio_list_on_stack[1]);
} else {
if (unlikely(!blk_queue_dying(q) &&
(bio->bi_opf & REQ_NOWAIT)))
bio_wouldblock_error(bio);
else
bio_io_error(bio);
}
bio = bio_list_pop(&bio_list_on_stack[0]);
} while (bio);
@ -1110,30 +1185,25 @@ EXPORT_SYMBOL(generic_make_request);
*
* This function behaves like generic_make_request(), but does not protect
* against recursion. Must only be used if the called driver is known
* to not call generic_make_request (or direct_make_request) again from
* its make_request function. (Calling direct_make_request again from
* a workqueue is perfectly fine as that doesn't recurse).
* to be blk-mq based.
*/
blk_qc_t direct_make_request(struct bio *bio)
{
struct request_queue *q = bio->bi_disk->queue;
bool nowait = bio->bi_opf & REQ_NOWAIT;
blk_qc_t ret;
if (!generic_make_request_checks(bio))
return BLK_QC_T_NONE;
if (unlikely(blk_queue_enter(q, nowait ? BLK_MQ_REQ_NOWAIT : 0))) {
if (nowait && !blk_queue_dying(q))
bio_wouldblock_error(bio);
else
bio_io_error(bio);
if (WARN_ON_ONCE(q->make_request_fn)) {
bio_io_error(bio);
return BLK_QC_T_NONE;
}
ret = q->make_request_fn(q, bio);
blk_queue_exit(q);
return ret;
if (!generic_make_request_checks(bio))
return BLK_QC_T_NONE;
if (unlikely(bio_queue_enter(bio)))
return BLK_QC_T_NONE;
if (!blk_crypto_bio_prep(&bio)) {
blk_queue_exit(q);
return BLK_QC_T_NONE;
}
return blk_mq_make_request(q, bio);
}
EXPORT_SYMBOL_GPL(direct_make_request);
@ -1141,17 +1211,17 @@ EXPORT_SYMBOL_GPL(direct_make_request);
* submit_bio - submit a bio to the block device layer for I/O
* @bio: The &struct bio which describes the I/O
*
* submit_bio() is very similar in purpose to generic_make_request(), and
* uses that function to do most of the work. Both are fairly rough
* interfaces; @bio must be presetup and ready for I/O.
* submit_bio() is used to submit I/O requests to block devices. It is passed a
* fully set up &struct bio that describes the I/O that needs to be done. The
* bio will be send to the device described by the bi_disk and bi_partno fields.
*
* The success/failure status of the request, along with notification of
* completion, is delivered asynchronously through the ->bi_end_io() callback
* in @bio. The bio must NOT be touched by thecaller until ->bi_end_io() has
* been called.
*/
blk_qc_t submit_bio(struct bio *bio)
{
bool workingset_read = false;
unsigned long pflags;
blk_qc_t ret;
if (blkcg_punt_bio_submit(bio))
return BLK_QC_T_NONE;
@ -1170,8 +1240,6 @@ blk_qc_t submit_bio(struct bio *bio)
if (op_is_write(bio_op(bio))) {
count_vm_events(PGPGOUT, count);
} else {
if (bio_flagged(bio, BIO_WORKINGSET))
workingset_read = true;
task_io_account_read(bio->bi_iter.bi_size);
count_vm_events(PGPGIN, count);
}
@ -1187,20 +1255,24 @@ blk_qc_t submit_bio(struct bio *bio)
}
/*
* If we're reading data that is part of the userspace
* workingset, count submission time as memory stall. When the
* device is congested, or the submitting cgroup IO-throttled,
* submission can be a significant part of overall IO time.
* If we're reading data that is part of the userspace workingset, count
* submission time as memory stall. When the device is congested, or
* the submitting cgroup IO-throttled, submission can be a significant
* part of overall IO time.
*/
if (workingset_read)
if (unlikely(bio_op(bio) == REQ_OP_READ &&
bio_flagged(bio, BIO_WORKINGSET))) {
unsigned long pflags;
blk_qc_t ret;
psi_memstall_enter(&pflags);
ret = generic_make_request(bio);
if (workingset_read)
ret = generic_make_request(bio);
psi_memstall_leave(&pflags);
return ret;
return ret;
}
return generic_make_request(bio);
}
EXPORT_SYMBOL(submit_bio);
@ -1261,8 +1333,11 @@ blk_status_t blk_insert_cloned_request(struct request_queue *q, struct request *
should_fail_request(&rq->rq_disk->part0, blk_rq_bytes(rq)))
return BLK_STS_IOERR;
if (blk_crypto_insert_cloned_request(rq))
return BLK_STS_IOERR;
if (blk_queue_io_stat(q))
blk_account_io_start(rq, true);
blk_account_io_start(rq);
/*
* Since we have a scheduler attached on the top device,
@ -1314,7 +1389,22 @@ unsigned int blk_rq_err_bytes(const struct request *rq)
}
EXPORT_SYMBOL_GPL(blk_rq_err_bytes);
void blk_account_io_completion(struct request *req, unsigned int bytes)
static void update_io_ticks(struct hd_struct *part, unsigned long now, bool end)
{
unsigned long stamp;
again:
stamp = READ_ONCE(part->stamp);
if (unlikely(stamp != now)) {
if (likely(cmpxchg(&part->stamp, stamp, now) == stamp))
__part_stat_add(part, io_ticks, end ? now - stamp : 1);
}
if (part->partno) {
part = &part_to_disk(part)->part0;
goto again;
}
}
static void blk_account_io_completion(struct request *req, unsigned int bytes)
{
if (req->part && blk_do_io_stat(req)) {
const int sgrp = op_stat_group(req_op(req));
@ -1345,49 +1435,58 @@ void blk_account_io_done(struct request *req, u64 now)
update_io_ticks(part, jiffies, true);
part_stat_inc(part, ios[sgrp]);
part_stat_add(part, nsecs[sgrp], now - req->start_time_ns);
part_dec_in_flight(req->q, part, rq_data_dir(req));
part_stat_unlock();
hd_struct_put(part);
part_stat_unlock();
}
}
void blk_account_io_start(struct request *rq, bool new_io)
void blk_account_io_start(struct request *rq)
{
struct hd_struct *part;
int rw = rq_data_dir(rq);
if (!blk_do_io_stat(rq))
return;
rq->part = disk_map_sector_rcu(rq->rq_disk, blk_rq_pos(rq));
part_stat_lock();
if (!new_io) {
part = rq->part;
part_stat_inc(part, merges[rw]);
} else {
part = disk_map_sector_rcu(rq->rq_disk, blk_rq_pos(rq));
if (!hd_struct_try_get(part)) {
/*
* The partition is already being removed,
* the request will be accounted on the disk only
*
* We take a reference on disk->part0 although that
* partition will never be deleted, so we can treat
* it as any other partition.
*/
part = &rq->rq_disk->part0;
hd_struct_get(part);
}
part_inc_in_flight(rq->q, part, rw);
rq->part = part;
}
update_io_ticks(part, jiffies, false);
update_io_ticks(rq->part, jiffies, false);
part_stat_unlock();
}
unsigned long disk_start_io_acct(struct gendisk *disk, unsigned int sectors,
unsigned int op)
{
struct hd_struct *part = &disk->part0;
const int sgrp = op_stat_group(op);
unsigned long now = READ_ONCE(jiffies);
part_stat_lock();
update_io_ticks(part, now, false);
part_stat_inc(part, ios[sgrp]);
part_stat_add(part, sectors[sgrp], sectors);
part_stat_local_inc(part, in_flight[op_is_write(op)]);
part_stat_unlock();
return now;
}
EXPORT_SYMBOL(disk_start_io_acct);
void disk_end_io_acct(struct gendisk *disk, unsigned int op,
unsigned long start_time)
{
struct hd_struct *part = &disk->part0;
const int sgrp = op_stat_group(op);
unsigned long now = READ_ONCE(jiffies);
unsigned long duration = now - start_time;
part_stat_lock();
update_io_ticks(part, now, true);
part_stat_add(part, nsecs[sgrp], jiffies_to_nsecs(duration));
part_stat_local_dec(part, in_flight[op_is_write(op)]);
part_stat_unlock();
}
EXPORT_SYMBOL(disk_end_io_acct);
/*
* Steal bios from a request and add them to a bio list.
* The request must not have been partially completed before.
@ -1636,7 +1735,9 @@ int blk_rq_prep_clone(struct request *rq, struct request *rq_src,
}
rq->nr_phys_segments = rq_src->nr_phys_segments;
rq->ioprio = rq_src->ioprio;
rq->extra_len = rq_src->extra_len;
if (rq->bio)
blk_crypto_rq_bio_prep(rq, rq->bio, gfp_mask);
return 0;
@ -1778,6 +1879,18 @@ void blk_finish_plug(struct blk_plug *plug)
}
EXPORT_SYMBOL(blk_finish_plug);
void blk_io_schedule(void)
{
/* Prevent hang_check timer from firing at us during very long I/O */
unsigned long timeout = sysctl_hung_task_timeout_secs * HZ / 2;
if (timeout)
io_schedule_timeout(timeout);
else
io_schedule();
}
EXPORT_SYMBOL_GPL(blk_io_schedule);
int __init blk_dev_init(void)
{
BUILD_BUG_ON(REQ_OP_LAST >= (1 << REQ_OP_BITS));

657
block/blk-crypto-fallback.c Normal file
View File

@ -0,0 +1,657 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2019 Google LLC
*/
/*
* Refer to Documentation/block/inline-encryption.rst for detailed explanation.
*/
#define pr_fmt(fmt) "blk-crypto-fallback: " fmt
#include <crypto/skcipher.h>
#include <linux/blk-cgroup.h>
#include <linux/blk-crypto.h>
#include <linux/blkdev.h>
#include <linux/crypto.h>
#include <linux/keyslot-manager.h>
#include <linux/mempool.h>
#include <linux/module.h>
#include <linux/random.h>
#include "blk-crypto-internal.h"
static unsigned int num_prealloc_bounce_pg = 32;
module_param(num_prealloc_bounce_pg, uint, 0);
MODULE_PARM_DESC(num_prealloc_bounce_pg,
"Number of preallocated bounce pages for the blk-crypto crypto API fallback");
static unsigned int blk_crypto_num_keyslots = 100;
module_param_named(num_keyslots, blk_crypto_num_keyslots, uint, 0);
MODULE_PARM_DESC(num_keyslots,
"Number of keyslots for the blk-crypto crypto API fallback");
static unsigned int num_prealloc_fallback_crypt_ctxs = 128;
module_param(num_prealloc_fallback_crypt_ctxs, uint, 0);
MODULE_PARM_DESC(num_prealloc_crypt_fallback_ctxs,
"Number of preallocated bio fallback crypto contexts for blk-crypto to use during crypto API fallback");
struct bio_fallback_crypt_ctx {
struct bio_crypt_ctx crypt_ctx;
/*
* Copy of the bvec_iter when this bio was submitted.
* We only want to en/decrypt the part of the bio as described by the
* bvec_iter upon submission because bio might be split before being
* resubmitted
*/
struct bvec_iter crypt_iter;
union {
struct {
struct work_struct work;
struct bio *bio;
};
struct {
void *bi_private_orig;
bio_end_io_t *bi_end_io_orig;
};
};
};
static struct kmem_cache *bio_fallback_crypt_ctx_cache;
static mempool_t *bio_fallback_crypt_ctx_pool;
/*
* Allocating a crypto tfm during I/O can deadlock, so we have to preallocate
* all of a mode's tfms when that mode starts being used. Since each mode may
* need all the keyslots at some point, each mode needs its own tfm for each
* keyslot; thus, a keyslot may contain tfms for multiple modes. However, to
* match the behavior of real inline encryption hardware (which only supports a
* single encryption context per keyslot), we only allow one tfm per keyslot to
* be used at a time - the rest of the unused tfms have their keys cleared.
*/
static DEFINE_MUTEX(tfms_init_lock);
static bool tfms_inited[BLK_ENCRYPTION_MODE_MAX];
static struct blk_crypto_keyslot {
enum blk_crypto_mode_num crypto_mode;
struct crypto_skcipher *tfms[BLK_ENCRYPTION_MODE_MAX];
} *blk_crypto_keyslots;
static struct blk_keyslot_manager blk_crypto_ksm;
static struct workqueue_struct *blk_crypto_wq;
static mempool_t *blk_crypto_bounce_page_pool;
/*
* This is the key we set when evicting a keyslot. This *should* be the all 0's
* key, but AES-XTS rejects that key, so we use some random bytes instead.
*/
static u8 blank_key[BLK_CRYPTO_MAX_KEY_SIZE];
static void blk_crypto_evict_keyslot(unsigned int slot)
{
struct blk_crypto_keyslot *slotp = &blk_crypto_keyslots[slot];
enum blk_crypto_mode_num crypto_mode = slotp->crypto_mode;
int err;
WARN_ON(slotp->crypto_mode == BLK_ENCRYPTION_MODE_INVALID);
/* Clear the key in the skcipher */
err = crypto_skcipher_setkey(slotp->tfms[crypto_mode], blank_key,
blk_crypto_modes[crypto_mode].keysize);
WARN_ON(err);
slotp->crypto_mode = BLK_ENCRYPTION_MODE_INVALID;
}
static int blk_crypto_keyslot_program(struct blk_keyslot_manager *ksm,
const struct blk_crypto_key *key,
unsigned int slot)
{
struct blk_crypto_keyslot *slotp = &blk_crypto_keyslots[slot];
const enum blk_crypto_mode_num crypto_mode =
key->crypto_cfg.crypto_mode;
int err;
if (crypto_mode != slotp->crypto_mode &&
slotp->crypto_mode != BLK_ENCRYPTION_MODE_INVALID)
blk_crypto_evict_keyslot(slot);
slotp->crypto_mode = crypto_mode;
err = crypto_skcipher_setkey(slotp->tfms[crypto_mode], key->raw,
key->size);
if (err) {
blk_crypto_evict_keyslot(slot);
return err;
}
return 0;
}
static int blk_crypto_keyslot_evict(struct blk_keyslot_manager *ksm,
const struct blk_crypto_key *key,
unsigned int slot)
{
blk_crypto_evict_keyslot(slot);
return 0;
}
/*
* The crypto API fallback KSM ops - only used for a bio when it specifies a
* blk_crypto_key that was not supported by the device's inline encryption
* hardware.
*/
static const struct blk_ksm_ll_ops blk_crypto_ksm_ll_ops = {
.keyslot_program = blk_crypto_keyslot_program,
.keyslot_evict = blk_crypto_keyslot_evict,
};
static void blk_crypto_fallback_encrypt_endio(struct bio *enc_bio)
{
struct bio *src_bio = enc_bio->bi_private;
int i;
for (i = 0; i < enc_bio->bi_vcnt; i++)
mempool_free(enc_bio->bi_io_vec[i].bv_page,
blk_crypto_bounce_page_pool);
src_bio->bi_status = enc_bio->bi_status;
bio_put(enc_bio);
bio_endio(src_bio);
}
static struct bio *blk_crypto_clone_bio(struct bio *bio_src)
{
struct bvec_iter iter;
struct bio_vec bv;
struct bio *bio;
bio = bio_alloc_bioset(GFP_NOIO, bio_segments(bio_src), NULL);
if (!bio)
return NULL;
bio->bi_disk = bio_src->bi_disk;
bio->bi_opf = bio_src->bi_opf;
bio->bi_ioprio = bio_src->bi_ioprio;
bio->bi_write_hint = bio_src->bi_write_hint;
bio->bi_iter.bi_sector = bio_src->bi_iter.bi_sector;
bio->bi_iter.bi_size = bio_src->bi_iter.bi_size;
bio_for_each_segment(bv, bio_src, iter)
bio->bi_io_vec[bio->bi_vcnt++] = bv;
bio_clone_blkg_association(bio, bio_src);
blkcg_bio_issue_init(bio);
return bio;
}
static bool blk_crypto_alloc_cipher_req(struct blk_ksm_keyslot *slot,
struct skcipher_request **ciph_req_ret,
struct crypto_wait *wait)
{
struct skcipher_request *ciph_req;
const struct blk_crypto_keyslot *slotp;
int keyslot_idx = blk_ksm_get_slot_idx(slot);
slotp = &blk_crypto_keyslots[keyslot_idx];
ciph_req = skcipher_request_alloc(slotp->tfms[slotp->crypto_mode],
GFP_NOIO);
if (!ciph_req)
return false;
skcipher_request_set_callback(ciph_req,
CRYPTO_TFM_REQ_MAY_BACKLOG |
CRYPTO_TFM_REQ_MAY_SLEEP,
crypto_req_done, wait);
*ciph_req_ret = ciph_req;
return true;
}
static bool blk_crypto_split_bio_if_needed(struct bio **bio_ptr)
{
struct bio *bio = *bio_ptr;
unsigned int i = 0;
unsigned int num_sectors = 0;
struct bio_vec bv;
struct bvec_iter iter;
bio_for_each_segment(bv, bio, iter) {
num_sectors += bv.bv_len >> SECTOR_SHIFT;
if (++i == BIO_MAX_PAGES)
break;
}
if (num_sectors < bio_sectors(bio)) {
struct bio *split_bio;
split_bio = bio_split(bio, num_sectors, GFP_NOIO, NULL);
if (!split_bio) {
bio->bi_status = BLK_STS_RESOURCE;
return false;
}
bio_chain(split_bio, bio);
generic_make_request(bio);
*bio_ptr = split_bio;
}
return true;
}
union blk_crypto_iv {
__le64 dun[BLK_CRYPTO_DUN_ARRAY_SIZE];
u8 bytes[BLK_CRYPTO_MAX_IV_SIZE];
};
static void blk_crypto_dun_to_iv(const u64 dun[BLK_CRYPTO_DUN_ARRAY_SIZE],
union blk_crypto_iv *iv)
{
int i;
for (i = 0; i < BLK_CRYPTO_DUN_ARRAY_SIZE; i++)
iv->dun[i] = cpu_to_le64(dun[i]);
}
/*
* The crypto API fallback's encryption routine.
* Allocate a bounce bio for encryption, encrypt the input bio using crypto API,
* and replace *bio_ptr with the bounce bio. May split input bio if it's too
* large. Returns true on success. Returns false and sets bio->bi_status on
* error.
*/
static bool blk_crypto_fallback_encrypt_bio(struct bio **bio_ptr)
{
struct bio *src_bio, *enc_bio;
struct bio_crypt_ctx *bc;
struct blk_ksm_keyslot *slot;
int data_unit_size;
struct skcipher_request *ciph_req = NULL;
DECLARE_CRYPTO_WAIT(wait);
u64 curr_dun[BLK_CRYPTO_DUN_ARRAY_SIZE];
struct scatterlist src, dst;
union blk_crypto_iv iv;
unsigned int i, j;
bool ret = false;
blk_status_t blk_st;
/* Split the bio if it's too big for single page bvec */
if (!blk_crypto_split_bio_if_needed(bio_ptr))
return false;
src_bio = *bio_ptr;
bc = src_bio->bi_crypt_context;
data_unit_size = bc->bc_key->crypto_cfg.data_unit_size;
/* Allocate bounce bio for encryption */
enc_bio = blk_crypto_clone_bio(src_bio);
if (!enc_bio) {
src_bio->bi_status = BLK_STS_RESOURCE;
return false;
}
/*
* Use the crypto API fallback keyslot manager to get a crypto_skcipher
* for the algorithm and key specified for this bio.
*/
blk_st = blk_ksm_get_slot_for_key(&blk_crypto_ksm, bc->bc_key, &slot);
if (blk_st != BLK_STS_OK) {
src_bio->bi_status = blk_st;
goto out_put_enc_bio;
}
/* and then allocate an skcipher_request for it */
if (!blk_crypto_alloc_cipher_req(slot, &ciph_req, &wait)) {
src_bio->bi_status = BLK_STS_RESOURCE;
goto out_release_keyslot;
}
memcpy(curr_dun, bc->bc_dun, sizeof(curr_dun));
sg_init_table(&src, 1);
sg_init_table(&dst, 1);
skcipher_request_set_crypt(ciph_req, &src, &dst, data_unit_size,
iv.bytes);
/* Encrypt each page in the bounce bio */
for (i = 0; i < enc_bio->bi_vcnt; i++) {
struct bio_vec *enc_bvec = &enc_bio->bi_io_vec[i];
struct page *plaintext_page = enc_bvec->bv_page;
struct page *ciphertext_page =
mempool_alloc(blk_crypto_bounce_page_pool, GFP_NOIO);
enc_bvec->bv_page = ciphertext_page;
if (!ciphertext_page) {
src_bio->bi_status = BLK_STS_RESOURCE;
goto out_free_bounce_pages;
}
sg_set_page(&src, plaintext_page, data_unit_size,
enc_bvec->bv_offset);
sg_set_page(&dst, ciphertext_page, data_unit_size,
enc_bvec->bv_offset);
/* Encrypt each data unit in this page */
for (j = 0; j < enc_bvec->bv_len; j += data_unit_size) {
blk_crypto_dun_to_iv(curr_dun, &iv);
if (crypto_wait_req(crypto_skcipher_encrypt(ciph_req),
&wait)) {
i++;
src_bio->bi_status = BLK_STS_IOERR;
goto out_free_bounce_pages;
}
bio_crypt_dun_increment(curr_dun, 1);
src.offset += data_unit_size;
dst.offset += data_unit_size;
}
}
enc_bio->bi_private = src_bio;
enc_bio->bi_end_io = blk_crypto_fallback_encrypt_endio;
*bio_ptr = enc_bio;
ret = true;
enc_bio = NULL;
goto out_free_ciph_req;
out_free_bounce_pages:
while (i > 0)
mempool_free(enc_bio->bi_io_vec[--i].bv_page,
blk_crypto_bounce_page_pool);
out_free_ciph_req:
skcipher_request_free(ciph_req);
out_release_keyslot:
blk_ksm_put_slot(slot);
out_put_enc_bio:
if (enc_bio)
bio_put(enc_bio);
return ret;
}
/*
* The crypto API fallback's main decryption routine.
* Decrypts input bio in place, and calls bio_endio on the bio.
*/
static void blk_crypto_fallback_decrypt_bio(struct work_struct *work)
{
struct bio_fallback_crypt_ctx *f_ctx =
container_of(work, struct bio_fallback_crypt_ctx, work);
struct bio *bio = f_ctx->bio;
struct bio_crypt_ctx *bc = &f_ctx->crypt_ctx;
struct blk_ksm_keyslot *slot;
struct skcipher_request *ciph_req = NULL;
DECLARE_CRYPTO_WAIT(wait);
u64 curr_dun[BLK_CRYPTO_DUN_ARRAY_SIZE];
union blk_crypto_iv iv;
struct scatterlist sg;
struct bio_vec bv;
struct bvec_iter iter;
const int data_unit_size = bc->bc_key->crypto_cfg.data_unit_size;
unsigned int i;
blk_status_t blk_st;
/*
* Use the crypto API fallback keyslot manager to get a crypto_skcipher
* for the algorithm and key specified for this bio.
*/
blk_st = blk_ksm_get_slot_for_key(&blk_crypto_ksm, bc->bc_key, &slot);
if (blk_st != BLK_STS_OK) {
bio->bi_status = blk_st;
goto out_no_keyslot;
}
/* and then allocate an skcipher_request for it */
if (!blk_crypto_alloc_cipher_req(slot, &ciph_req, &wait)) {
bio->bi_status = BLK_STS_RESOURCE;
goto out;
}
memcpy(curr_dun, bc->bc_dun, sizeof(curr_dun));
sg_init_table(&sg, 1);
skcipher_request_set_crypt(ciph_req, &sg, &sg, data_unit_size,
iv.bytes);
/* Decrypt each segment in the bio */
__bio_for_each_segment(bv, bio, iter, f_ctx->crypt_iter) {
struct page *page = bv.bv_page;
sg_set_page(&sg, page, data_unit_size, bv.bv_offset);
/* Decrypt each data unit in the segment */
for (i = 0; i < bv.bv_len; i += data_unit_size) {
blk_crypto_dun_to_iv(curr_dun, &iv);
if (crypto_wait_req(crypto_skcipher_decrypt(ciph_req),
&wait)) {
bio->bi_status = BLK_STS_IOERR;
goto out;
}
bio_crypt_dun_increment(curr_dun, 1);
sg.offset += data_unit_size;
}
}
out:
skcipher_request_free(ciph_req);
blk_ksm_put_slot(slot);
out_no_keyslot:
mempool_free(f_ctx, bio_fallback_crypt_ctx_pool);
bio_endio(bio);
}
/**
* blk_crypto_fallback_decrypt_endio - queue bio for fallback decryption
*
* @bio: the bio to queue
*
* Restore bi_private and bi_end_io, and queue the bio for decryption into a
* workqueue, since this function will be called from an atomic context.
*/
static void blk_crypto_fallback_decrypt_endio(struct bio *bio)
{
struct bio_fallback_crypt_ctx *f_ctx = bio->bi_private;
bio->bi_private = f_ctx->bi_private_orig;
bio->bi_end_io = f_ctx->bi_end_io_orig;
/* If there was an IO error, don't queue for decrypt. */
if (bio->bi_status) {
mempool_free(f_ctx, bio_fallback_crypt_ctx_pool);
bio_endio(bio);
return;
}
INIT_WORK(&f_ctx->work, blk_crypto_fallback_decrypt_bio);
f_ctx->bio = bio;
queue_work(blk_crypto_wq, &f_ctx->work);
}
/**
* blk_crypto_fallback_bio_prep - Prepare a bio to use fallback en/decryption
*
* @bio_ptr: pointer to the bio to prepare
*
* If bio is doing a WRITE operation, this splits the bio into two parts if it's
* too big (see blk_crypto_split_bio_if_needed). It then allocates a bounce bio
* for the first part, encrypts it, and update bio_ptr to point to the bounce
* bio.
*
* For a READ operation, we mark the bio for decryption by using bi_private and
* bi_end_io.
*
* In either case, this function will make the bio look like a regular bio (i.e.
* as if no encryption context was ever specified) for the purposes of the rest
* of the stack except for blk-integrity (blk-integrity and blk-crypto are not
* currently supported together).
*
* Return: true on success. Sets bio->bi_status and returns false on error.
*/
bool blk_crypto_fallback_bio_prep(struct bio **bio_ptr)
{
struct bio *bio = *bio_ptr;
struct bio_crypt_ctx *bc = bio->bi_crypt_context;
struct bio_fallback_crypt_ctx *f_ctx;
if (WARN_ON_ONCE(!tfms_inited[bc->bc_key->crypto_cfg.crypto_mode])) {
/* User didn't call blk_crypto_start_using_key() first */
bio->bi_status = BLK_STS_IOERR;
return false;
}
if (!blk_ksm_crypto_cfg_supported(&blk_crypto_ksm,
&bc->bc_key->crypto_cfg)) {
bio->bi_status = BLK_STS_NOTSUPP;
return false;
}
if (bio_data_dir(bio) == WRITE)
return blk_crypto_fallback_encrypt_bio(bio_ptr);
/*
* bio READ case: Set up a f_ctx in the bio's bi_private and set the
* bi_end_io appropriately to trigger decryption when the bio is ended.
*/
f_ctx = mempool_alloc(bio_fallback_crypt_ctx_pool, GFP_NOIO);
f_ctx->crypt_ctx = *bc;
f_ctx->crypt_iter = bio->bi_iter;
f_ctx->bi_private_orig = bio->bi_private;
f_ctx->bi_end_io_orig = bio->bi_end_io;
bio->bi_private = (void *)f_ctx;
bio->bi_end_io = blk_crypto_fallback_decrypt_endio;
bio_crypt_free_ctx(bio);
return true;
}
int blk_crypto_fallback_evict_key(const struct blk_crypto_key *key)
{
return blk_ksm_evict_key(&blk_crypto_ksm, key);
}
static bool blk_crypto_fallback_inited;
static int blk_crypto_fallback_init(void)
{
int i;
int err;
if (blk_crypto_fallback_inited)
return 0;
prandom_bytes(blank_key, BLK_CRYPTO_MAX_KEY_SIZE);
err = blk_ksm_init(&blk_crypto_ksm, blk_crypto_num_keyslots);
if (err)
goto out;
err = -ENOMEM;
blk_crypto_ksm.ksm_ll_ops = blk_crypto_ksm_ll_ops;
blk_crypto_ksm.max_dun_bytes_supported = BLK_CRYPTO_MAX_IV_SIZE;
/* All blk-crypto modes have a crypto API fallback. */
for (i = 0; i < BLK_ENCRYPTION_MODE_MAX; i++)
blk_crypto_ksm.crypto_modes_supported[i] = 0xFFFFFFFF;
blk_crypto_ksm.crypto_modes_supported[BLK_ENCRYPTION_MODE_INVALID] = 0;
blk_crypto_wq = alloc_workqueue("blk_crypto_wq",
WQ_UNBOUND | WQ_HIGHPRI |
WQ_MEM_RECLAIM, num_online_cpus());
if (!blk_crypto_wq)
goto fail_free_ksm;
blk_crypto_keyslots = kcalloc(blk_crypto_num_keyslots,
sizeof(blk_crypto_keyslots[0]),
GFP_KERNEL);
if (!blk_crypto_keyslots)
goto fail_free_wq;
blk_crypto_bounce_page_pool =
mempool_create_page_pool(num_prealloc_bounce_pg, 0);
if (!blk_crypto_bounce_page_pool)
goto fail_free_keyslots;
bio_fallback_crypt_ctx_cache = KMEM_CACHE(bio_fallback_crypt_ctx, 0);
if (!bio_fallback_crypt_ctx_cache)
goto fail_free_bounce_page_pool;
bio_fallback_crypt_ctx_pool =
mempool_create_slab_pool(num_prealloc_fallback_crypt_ctxs,
bio_fallback_crypt_ctx_cache);
if (!bio_fallback_crypt_ctx_pool)
goto fail_free_crypt_ctx_cache;
blk_crypto_fallback_inited = true;
return 0;
fail_free_crypt_ctx_cache:
kmem_cache_destroy(bio_fallback_crypt_ctx_cache);
fail_free_bounce_page_pool:
mempool_destroy(blk_crypto_bounce_page_pool);
fail_free_keyslots:
kfree(blk_crypto_keyslots);
fail_free_wq:
destroy_workqueue(blk_crypto_wq);
fail_free_ksm:
blk_ksm_destroy(&blk_crypto_ksm);
out:
return err;
}
/*
* Prepare blk-crypto-fallback for the specified crypto mode.
* Returns -ENOPKG if the needed crypto API support is missing.
*/
int blk_crypto_fallback_start_using_mode(enum blk_crypto_mode_num mode_num)
{
const char *cipher_str = blk_crypto_modes[mode_num].cipher_str;
struct blk_crypto_keyslot *slotp;
unsigned int i;
int err = 0;
/*
* Fast path
* Ensure that updates to blk_crypto_keyslots[i].tfms[mode_num]
* for each i are visible before we try to access them.
*/
if (likely(smp_load_acquire(&tfms_inited[mode_num])))
return 0;
mutex_lock(&tfms_init_lock);
if (tfms_inited[mode_num])
goto out;
err = blk_crypto_fallback_init();
if (err)
goto out;
for (i = 0; i < blk_crypto_num_keyslots; i++) {
slotp = &blk_crypto_keyslots[i];
slotp->tfms[mode_num] = crypto_alloc_skcipher(cipher_str, 0, 0);
if (IS_ERR(slotp->tfms[mode_num])) {
err = PTR_ERR(slotp->tfms[mode_num]);
if (err == -ENOENT) {
pr_warn_once("Missing crypto API support for \"%s\"\n",
cipher_str);
err = -ENOPKG;
}
slotp->tfms[mode_num] = NULL;
goto out_free_tfms;
}
crypto_skcipher_set_flags(slotp->tfms[mode_num],
CRYPTO_TFM_REQ_FORBID_WEAK_KEYS);
}
/*
* Ensure that updates to blk_crypto_keyslots[i].tfms[mode_num]
* for each i are visible before we set tfms_inited[mode_num].
*/
smp_store_release(&tfms_inited[mode_num], true);
goto out;
out_free_tfms:
for (i = 0; i < blk_crypto_num_keyslots; i++) {
slotp = &blk_crypto_keyslots[i];
crypto_free_skcipher(slotp->tfms[mode_num]);
slotp->tfms[mode_num] = NULL;
}
out:
mutex_unlock(&tfms_init_lock);
return err;
}

201
block/blk-crypto-internal.h Normal file
View File

@ -0,0 +1,201 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright 2019 Google LLC
*/
#ifndef __LINUX_BLK_CRYPTO_INTERNAL_H
#define __LINUX_BLK_CRYPTO_INTERNAL_H
#include <linux/bio.h>
#include <linux/blkdev.h>
/* Represents a crypto mode supported by blk-crypto */
struct blk_crypto_mode {
const char *cipher_str; /* crypto API name (for fallback case) */
unsigned int keysize; /* key size in bytes */
unsigned int ivsize; /* iv size in bytes */
};
extern const struct blk_crypto_mode blk_crypto_modes[];
#ifdef CONFIG_BLK_INLINE_ENCRYPTION
void bio_crypt_dun_increment(u64 dun[BLK_CRYPTO_DUN_ARRAY_SIZE],
unsigned int inc);
bool bio_crypt_rq_ctx_compatible(struct request *rq, struct bio *bio);
bool bio_crypt_ctx_mergeable(struct bio_crypt_ctx *bc1, unsigned int bc1_bytes,
struct bio_crypt_ctx *bc2);
static inline bool bio_crypt_ctx_back_mergeable(struct request *req,
struct bio *bio)
{
return bio_crypt_ctx_mergeable(req->crypt_ctx, blk_rq_bytes(req),
bio->bi_crypt_context);
}
static inline bool bio_crypt_ctx_front_mergeable(struct request *req,
struct bio *bio)
{
return bio_crypt_ctx_mergeable(bio->bi_crypt_context,
bio->bi_iter.bi_size, req->crypt_ctx);
}
static inline bool bio_crypt_ctx_merge_rq(struct request *req,
struct request *next)
{
return bio_crypt_ctx_mergeable(req->crypt_ctx, blk_rq_bytes(req),
next->crypt_ctx);
}
static inline void blk_crypto_rq_set_defaults(struct request *rq)
{
rq->crypt_ctx = NULL;
rq->crypt_keyslot = NULL;
}
static inline bool blk_crypto_rq_is_encrypted(struct request *rq)
{
return rq->crypt_ctx;
}
#else /* CONFIG_BLK_INLINE_ENCRYPTION */
static inline bool bio_crypt_rq_ctx_compatible(struct request *rq,
struct bio *bio)
{
return true;
}
static inline bool bio_crypt_ctx_front_mergeable(struct request *req,
struct bio *bio)
{
return true;
}
static inline bool bio_crypt_ctx_back_mergeable(struct request *req,
struct bio *bio)
{
return true;
}
static inline bool bio_crypt_ctx_merge_rq(struct request *req,
struct request *next)
{
return true;
}
static inline void blk_crypto_rq_set_defaults(struct request *rq) { }
static inline bool blk_crypto_rq_is_encrypted(struct request *rq)
{
return false;
}
#endif /* CONFIG_BLK_INLINE_ENCRYPTION */
void __bio_crypt_advance(struct bio *bio, unsigned int bytes);
static inline void bio_crypt_advance(struct bio *bio, unsigned int bytes)
{
if (bio_has_crypt_ctx(bio))
__bio_crypt_advance(bio, bytes);
}
void __bio_crypt_free_ctx(struct bio *bio);
static inline void bio_crypt_free_ctx(struct bio *bio)
{
if (bio_has_crypt_ctx(bio))
__bio_crypt_free_ctx(bio);
}
static inline void bio_crypt_do_front_merge(struct request *rq,
struct bio *bio)
{
#ifdef CONFIG_BLK_INLINE_ENCRYPTION
if (bio_has_crypt_ctx(bio))
memcpy(rq->crypt_ctx->bc_dun, bio->bi_crypt_context->bc_dun,
sizeof(rq->crypt_ctx->bc_dun));
#endif
}
bool __blk_crypto_bio_prep(struct bio **bio_ptr);
static inline bool blk_crypto_bio_prep(struct bio **bio_ptr)
{
if (bio_has_crypt_ctx(*bio_ptr))
return __blk_crypto_bio_prep(bio_ptr);
return true;
}
blk_status_t __blk_crypto_init_request(struct request *rq);
static inline blk_status_t blk_crypto_init_request(struct request *rq)
{
if (blk_crypto_rq_is_encrypted(rq))
return __blk_crypto_init_request(rq);
return BLK_STS_OK;
}
void __blk_crypto_free_request(struct request *rq);
static inline void blk_crypto_free_request(struct request *rq)
{
if (blk_crypto_rq_is_encrypted(rq))
__blk_crypto_free_request(rq);
}
void __blk_crypto_rq_bio_prep(struct request *rq, struct bio *bio,
gfp_t gfp_mask);
static inline void blk_crypto_rq_bio_prep(struct request *rq, struct bio *bio,
gfp_t gfp_mask)
{
if (bio_has_crypt_ctx(bio))
__blk_crypto_rq_bio_prep(rq, bio, gfp_mask);
}
/**
* blk_crypto_insert_cloned_request - Prepare a cloned request to be inserted
* into a request queue.
* @rq: the request being queued
*
* Return: BLK_STS_OK on success, nonzero on error.
*/
static inline blk_status_t blk_crypto_insert_cloned_request(struct request *rq)
{
if (blk_crypto_rq_is_encrypted(rq))
return blk_crypto_init_request(rq);
return BLK_STS_OK;
}
#ifdef CONFIG_BLK_INLINE_ENCRYPTION_FALLBACK
int blk_crypto_fallback_start_using_mode(enum blk_crypto_mode_num mode_num);
bool blk_crypto_fallback_bio_prep(struct bio **bio_ptr);
int blk_crypto_fallback_evict_key(const struct blk_crypto_key *key);
#else /* CONFIG_BLK_INLINE_ENCRYPTION_FALLBACK */
static inline int
blk_crypto_fallback_start_using_mode(enum blk_crypto_mode_num mode_num)
{
pr_warn_once("crypto API fallback is disabled\n");
return -ENOPKG;
}
static inline bool blk_crypto_fallback_bio_prep(struct bio **bio_ptr)
{
pr_warn_once("crypto API fallback disabled; failing request.\n");
(*bio_ptr)->bi_status = BLK_STS_NOTSUPP;
return false;
}
static inline int
blk_crypto_fallback_evict_key(const struct blk_crypto_key *key)
{
return 0;
}
#endif /* CONFIG_BLK_INLINE_ENCRYPTION_FALLBACK */
#endif /* __LINUX_BLK_CRYPTO_INTERNAL_H */

404
block/blk-crypto.c Normal file
View File

@ -0,0 +1,404 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2019 Google LLC
*/
/*
* Refer to Documentation/block/inline-encryption.rst for detailed explanation.
*/
#define pr_fmt(fmt) "blk-crypto: " fmt
#include <linux/bio.h>
#include <linux/blkdev.h>
#include <linux/keyslot-manager.h>
#include <linux/module.h>
#include <linux/slab.h>
#include "blk-crypto-internal.h"
const struct blk_crypto_mode blk_crypto_modes[] = {
[BLK_ENCRYPTION_MODE_AES_256_XTS] = {
.cipher_str = "xts(aes)",
.keysize = 64,
.ivsize = 16,
},
[BLK_ENCRYPTION_MODE_AES_128_CBC_ESSIV] = {
.cipher_str = "essiv(cbc(aes),sha256)",
.keysize = 16,
.ivsize = 16,
},
[BLK_ENCRYPTION_MODE_ADIANTUM] = {
.cipher_str = "adiantum(xchacha12,aes)",
.keysize = 32,
.ivsize = 32,
},
};
/*
* This number needs to be at least (the number of threads doing IO
* concurrently) * (maximum recursive depth of a bio), so that we don't
* deadlock on crypt_ctx allocations. The default is chosen to be the same
* as the default number of post read contexts in both EXT4 and F2FS.
*/
static int num_prealloc_crypt_ctxs = 128;
module_param(num_prealloc_crypt_ctxs, int, 0444);
MODULE_PARM_DESC(num_prealloc_crypt_ctxs,
"Number of bio crypto contexts to preallocate");
static struct kmem_cache *bio_crypt_ctx_cache;
static mempool_t *bio_crypt_ctx_pool;
static int __init bio_crypt_ctx_init(void)
{
size_t i;
bio_crypt_ctx_cache = KMEM_CACHE(bio_crypt_ctx, 0);
if (!bio_crypt_ctx_cache)
goto out_no_mem;
bio_crypt_ctx_pool = mempool_create_slab_pool(num_prealloc_crypt_ctxs,
bio_crypt_ctx_cache);
if (!bio_crypt_ctx_pool)
goto out_no_mem;
/* This is assumed in various places. */
BUILD_BUG_ON(BLK_ENCRYPTION_MODE_INVALID != 0);
/* Sanity check that no algorithm exceeds the defined limits. */
for (i = 0; i < BLK_ENCRYPTION_MODE_MAX; i++) {
BUG_ON(blk_crypto_modes[i].keysize > BLK_CRYPTO_MAX_KEY_SIZE);
BUG_ON(blk_crypto_modes[i].ivsize > BLK_CRYPTO_MAX_IV_SIZE);
}
return 0;
out_no_mem:
panic("Failed to allocate mem for bio crypt ctxs\n");
}
subsys_initcall(bio_crypt_ctx_init);
void bio_crypt_set_ctx(struct bio *bio, const struct blk_crypto_key *key,
const u64 dun[BLK_CRYPTO_DUN_ARRAY_SIZE], gfp_t gfp_mask)
{
struct bio_crypt_ctx *bc = mempool_alloc(bio_crypt_ctx_pool, gfp_mask);
bc->bc_key = key;
memcpy(bc->bc_dun, dun, sizeof(bc->bc_dun));
bio->bi_crypt_context = bc;
}
void __bio_crypt_free_ctx(struct bio *bio)
{
mempool_free(bio->bi_crypt_context, bio_crypt_ctx_pool);
bio->bi_crypt_context = NULL;
}
void __bio_crypt_clone(struct bio *dst, struct bio *src, gfp_t gfp_mask)
{
dst->bi_crypt_context = mempool_alloc(bio_crypt_ctx_pool, gfp_mask);
*dst->bi_crypt_context = *src->bi_crypt_context;
}
EXPORT_SYMBOL_GPL(__bio_crypt_clone);
/* Increments @dun by @inc, treating @dun as a multi-limb integer. */
void bio_crypt_dun_increment(u64 dun[BLK_CRYPTO_DUN_ARRAY_SIZE],
unsigned int inc)
{
int i;
for (i = 0; inc && i < BLK_CRYPTO_DUN_ARRAY_SIZE; i++) {
dun[i] += inc;
/*
* If the addition in this limb overflowed, then we need to
* carry 1 into the next limb. Else the carry is 0.
*/
if (dun[i] < inc)
inc = 1;
else
inc = 0;
}
}
void __bio_crypt_advance(struct bio *bio, unsigned int bytes)
{
struct bio_crypt_ctx *bc = bio->bi_crypt_context;
bio_crypt_dun_increment(bc->bc_dun,
bytes >> bc->bc_key->data_unit_size_bits);
}
/*
* Returns true if @bc->bc_dun plus @bytes converted to data units is equal to
* @next_dun, treating the DUNs as multi-limb integers.
*/
bool bio_crypt_dun_is_contiguous(const struct bio_crypt_ctx *bc,
unsigned int bytes,
const u64 next_dun[BLK_CRYPTO_DUN_ARRAY_SIZE])
{
int i;
unsigned int carry = bytes >> bc->bc_key->data_unit_size_bits;
for (i = 0; i < BLK_CRYPTO_DUN_ARRAY_SIZE; i++) {
if (bc->bc_dun[i] + carry != next_dun[i])
return false;
/*
* If the addition in this limb overflowed, then we need to
* carry 1 into the next limb. Else the carry is 0.
*/
if ((bc->bc_dun[i] + carry) < carry)
carry = 1;
else
carry = 0;
}
/* If the DUN wrapped through 0, don't treat it as contiguous. */
return carry == 0;
}
/*
* Checks that two bio crypt contexts are compatible - i.e. that
* they are mergeable except for data_unit_num continuity.
*/
static bool bio_crypt_ctx_compatible(struct bio_crypt_ctx *bc1,
struct bio_crypt_ctx *bc2)
{
if (!bc1)
return !bc2;
return bc2 && bc1->bc_key == bc2->bc_key;
}
bool bio_crypt_rq_ctx_compatible(struct request *rq, struct bio *bio)
{
return bio_crypt_ctx_compatible(rq->crypt_ctx, bio->bi_crypt_context);
}
/*
* Checks that two bio crypt contexts are compatible, and also
* that their data_unit_nums are continuous (and can hence be merged)
* in the order @bc1 followed by @bc2.
*/
bool bio_crypt_ctx_mergeable(struct bio_crypt_ctx *bc1, unsigned int bc1_bytes,
struct bio_crypt_ctx *bc2)
{
if (!bio_crypt_ctx_compatible(bc1, bc2))
return false;
return !bc1 || bio_crypt_dun_is_contiguous(bc1, bc1_bytes, bc2->bc_dun);
}
/* Check that all I/O segments are data unit aligned. */
static bool bio_crypt_check_alignment(struct bio *bio)
{
const unsigned int data_unit_size =
bio->bi_crypt_context->bc_key->crypto_cfg.data_unit_size;
struct bvec_iter iter;
struct bio_vec bv;
bio_for_each_segment(bv, bio, iter) {
if (!IS_ALIGNED(bv.bv_len | bv.bv_offset, data_unit_size))
return false;
}
return true;
}
blk_status_t __blk_crypto_init_request(struct request *rq)
{
return blk_ksm_get_slot_for_key(rq->q->ksm, rq->crypt_ctx->bc_key,
&rq->crypt_keyslot);
}
/**
* __blk_crypto_free_request - Uninitialize the crypto fields of a request.
*
* @rq: The request whose crypto fields to uninitialize.
*
* Completely uninitializes the crypto fields of a request. If a keyslot has
* been programmed into some inline encryption hardware, that keyslot is
* released. The rq->crypt_ctx is also freed.
*/
void __blk_crypto_free_request(struct request *rq)
{
blk_ksm_put_slot(rq->crypt_keyslot);
mempool_free(rq->crypt_ctx, bio_crypt_ctx_pool);
blk_crypto_rq_set_defaults(rq);
}
/**
* __blk_crypto_bio_prep - Prepare bio for inline encryption
*
* @bio_ptr: pointer to original bio pointer
*
* If the bio crypt context provided for the bio is supported by the underlying
* device's inline encryption hardware, do nothing.
*
* Otherwise, try to perform en/decryption for this bio by falling back to the
* kernel crypto API. When the crypto API fallback is used for encryption,
* blk-crypto may choose to split the bio into 2 - the first one that will
* continue to be processed and the second one that will be resubmitted via
* generic_make_request. A bounce bio will be allocated to encrypt the contents
* of the aforementioned "first one", and *bio_ptr will be updated to this
* bounce bio.
*
* Caller must ensure bio has bio_crypt_ctx.
*
* Return: true on success; false on error (and bio->bi_status will be set
* appropriately, and bio_endio() will have been called so bio
* submission should abort).
*/
bool __blk_crypto_bio_prep(struct bio **bio_ptr)
{
struct bio *bio = *bio_ptr;
const struct blk_crypto_key *bc_key = bio->bi_crypt_context->bc_key;
/* Error if bio has no data. */
if (WARN_ON_ONCE(!bio_has_data(bio))) {
bio->bi_status = BLK_STS_IOERR;
goto fail;
}
if (!bio_crypt_check_alignment(bio)) {
bio->bi_status = BLK_STS_IOERR;
goto fail;
}
/*
* Success if device supports the encryption context, or if we succeeded
* in falling back to the crypto API.
*/
if (blk_ksm_crypto_cfg_supported(bio->bi_disk->queue->ksm,
&bc_key->crypto_cfg))
return true;
if (blk_crypto_fallback_bio_prep(bio_ptr))
return true;
fail:
bio_endio(*bio_ptr);
return false;
}
/**
* __blk_crypto_rq_bio_prep - Prepare a request's crypt_ctx when its first bio
* is inserted
*
* @rq: The request to prepare
* @bio: The first bio being inserted into the request
* @gfp_mask: gfp mask
*/
void __blk_crypto_rq_bio_prep(struct request *rq, struct bio *bio,
gfp_t gfp_mask)
{
if (!rq->crypt_ctx)
rq->crypt_ctx = mempool_alloc(bio_crypt_ctx_pool, gfp_mask);
*rq->crypt_ctx = *bio->bi_crypt_context;
}
/**
* blk_crypto_init_key() - Prepare a key for use with blk-crypto
* @blk_key: Pointer to the blk_crypto_key to initialize.
* @raw_key: Pointer to the raw key. Must be the correct length for the chosen
* @crypto_mode; see blk_crypto_modes[].
* @crypto_mode: identifier for the encryption algorithm to use
* @dun_bytes: number of bytes that will be used to specify the DUN when this
* key is used
* @data_unit_size: the data unit size to use for en/decryption
*
* Return: 0 on success, -errno on failure. The caller is responsible for
* zeroizing both blk_key and raw_key when done with them.
*/
int blk_crypto_init_key(struct blk_crypto_key *blk_key, const u8 *raw_key,
enum blk_crypto_mode_num crypto_mode,
unsigned int dun_bytes,
unsigned int data_unit_size)
{
const struct blk_crypto_mode *mode;
memset(blk_key, 0, sizeof(*blk_key));
if (crypto_mode >= ARRAY_SIZE(blk_crypto_modes))
return -EINVAL;
mode = &blk_crypto_modes[crypto_mode];
if (mode->keysize == 0)
return -EINVAL;
if (dun_bytes == 0 || dun_bytes > BLK_CRYPTO_MAX_IV_SIZE)
return -EINVAL;
if (!is_power_of_2(data_unit_size))
return -EINVAL;
blk_key->crypto_cfg.crypto_mode = crypto_mode;
blk_key->crypto_cfg.dun_bytes = dun_bytes;
blk_key->crypto_cfg.data_unit_size = data_unit_size;
blk_key->data_unit_size_bits = ilog2(data_unit_size);
blk_key->size = mode->keysize;
memcpy(blk_key->raw, raw_key, mode->keysize);
return 0;
}
/*
* Check if bios with @cfg can be en/decrypted by blk-crypto (i.e. either the
* request queue it's submitted to supports inline crypto, or the
* blk-crypto-fallback is enabled and supports the cfg).
*/
bool blk_crypto_config_supported(struct request_queue *q,
const struct blk_crypto_config *cfg)
{
return IS_ENABLED(CONFIG_BLK_INLINE_ENCRYPTION_FALLBACK) ||
blk_ksm_crypto_cfg_supported(q->ksm, cfg);
}
/**
* blk_crypto_start_using_key() - Start using a blk_crypto_key on a device
* @key: A key to use on the device
* @q: the request queue for the device
*
* Upper layers must call this function to ensure that either the hardware
* supports the key's crypto settings, or the crypto API fallback has transforms
* for the needed mode allocated and ready to go. This function may allocate
* an skcipher, and *should not* be called from the data path, since that might
* cause a deadlock
*
* Return: 0 on success; -ENOPKG if the hardware doesn't support the key and
* blk-crypto-fallback is either disabled or the needed algorithm
* is disabled in the crypto API; or another -errno code.
*/
int blk_crypto_start_using_key(const struct blk_crypto_key *key,
struct request_queue *q)
{
if (blk_ksm_crypto_cfg_supported(q->ksm, &key->crypto_cfg))
return 0;
return blk_crypto_fallback_start_using_mode(key->crypto_cfg.crypto_mode);
}
/**
* blk_crypto_evict_key() - Evict a key from any inline encryption hardware
* it may have been programmed into
* @q: The request queue who's associated inline encryption hardware this key
* might have been programmed into
* @key: The key to evict
*
* Upper layers (filesystems) must call this function to ensure that a key is
* evicted from any hardware that it might have been programmed into. The key
* must not be in use by any in-flight IO when this function is called.
*
* Return: 0 on success or if key is not present in the q's ksm, -err on error.
*/
int blk_crypto_evict_key(struct request_queue *q,
const struct blk_crypto_key *key)
{
if (blk_ksm_crypto_cfg_supported(q->ksm, &key->crypto_cfg))
return blk_ksm_evict_key(q->ksm, key);
/*
* If the request queue's associated inline encryption hardware didn't
* have support for the key, then the key might have been programmed
* into the fallback keyslot manager, so try to evict from there.
*/
return blk_crypto_fallback_evict_key(key);
}

2
block/blk-exec.c
View File

@ -55,7 +55,7 @@ void blk_execute_rq_nowait(struct request_queue *q, struct gendisk *bd_disk,
rq->rq_disk = bd_disk;
rq->end_io = done;
blk_account_io_start(rq, true);
blk_account_io_start(rq);
/*
* don't check dying flag for MQ because the request won't

26
block/blk-flush.c
View File

@ -258,7 +258,6 @@ static void flush_end_io(struct request *flush_rq, blk_status_t error)
blk_flush_complete_seq(rq, fq, seq, error);
}
fq->flush_queue_delayed = 0;
spin_unlock_irqrestore(&fq->mq_flush_lock, flags);
}
@ -433,41 +432,20 @@ void blk_insert_flush(struct request *rq)
* blkdev_issue_flush - queue a flush
* @bdev: blockdev to issue flush for
* @gfp_mask: memory allocation flags (for bio_alloc)
* @error_sector: error sector
*
* Description:
* Issue a flush for the block device in question. Caller can supply
* room for storing the error offset in case of a flush error, if they
* wish to.
* Issue a flush for the block device in question.
*/
int blkdev_issue_flush(struct block_device *bdev, gfp_t gfp_mask,
sector_t *error_sector)
int blkdev_issue_flush(struct block_device *bdev, gfp_t gfp_mask)
{
struct request_queue *q;
struct bio *bio;
int ret = 0;
if (bdev->bd_disk == NULL)
return -ENXIO;
q = bdev_get_queue(bdev);
if (!q)
return -ENXIO;
bio = bio_alloc(gfp_mask, 0);
bio_set_dev(bio, bdev);
bio->bi_opf = REQ_OP_WRITE | REQ_PREFLUSH;
ret = submit_bio_wait(bio);
/*
* The driver must store the error location in ->bi_sector, if
* it supports it. For non-stacked drivers, this should be
* copied from blk_rq_pos(rq).
*/
if (error_sector)
*error_sector = bio->bi_iter.bi_sector;
bio_put(bio);
return ret;
}

7
block/blk-integrity.c
View File

@ -409,6 +409,13 @@ void blk_integrity_register(struct gendisk *disk, struct blk_integrity *template
bi->tag_size = template->tag_size;
disk->queue->backing_dev_info->capabilities |= BDI_CAP_STABLE_WRITES;
#ifdef CONFIG_BLK_INLINE_ENCRYPTION
if (disk->queue->ksm) {
pr_warn("blk-integrity: Integrity and hardware inline encryption are not supported together. Disabling hardware inline encryption.\n");
blk_ksm_unregister(disk->queue);
}
#endif
}
EXPORT_SYMBOL(blk_integrity_register);

86
block/blk-iocost.c
View File

@ -260,6 +260,7 @@ enum {
VTIME_PER_SEC_SHIFT = 37,
VTIME_PER_SEC = 1LLU << VTIME_PER_SEC_SHIFT,
VTIME_PER_USEC = VTIME_PER_SEC / USEC_PER_SEC,
VTIME_PER_NSEC = VTIME_PER_SEC / NSEC_PER_SEC,
/* bound vrate adjustments within two orders of magnitude */
VRATE_MIN_PPM = 10000, /* 1% */
@ -1206,14 +1207,14 @@ static enum hrtimer_restart iocg_waitq_timer_fn(struct hrtimer *timer)
return HRTIMER_NORESTART;
}
static bool iocg_kick_delay(struct ioc_gq *iocg, struct ioc_now *now, u64 cost)
static bool iocg_kick_delay(struct ioc_gq *iocg, struct ioc_now *now)
{
struct ioc *ioc = iocg->ioc;
struct blkcg_gq *blkg = iocg_to_blkg(iocg);
u64 vtime = atomic64_read(&iocg->vtime);
u64 vmargin = ioc->margin_us * now->vrate;
u64 margin_ns = ioc->margin_us * NSEC_PER_USEC;
u64 expires, oexpires;
u64 delta_ns, expires, oexpires;
u32 hw_inuse;
lockdep_assert_held(&iocg->waitq.lock);
@ -1236,15 +1237,10 @@ static bool iocg_kick_delay(struct ioc_gq *iocg, struct ioc_now *now, u64 cost)
return false;
/* use delay */
if (cost) {
u64 cost_ns = DIV64_U64_ROUND_UP(cost * NSEC_PER_USEC,
now->vrate);
blkcg_add_delay(blkg, now->now_ns, cost_ns);
}
blkcg_use_delay(blkg);
expires = now->now_ns + DIV64_U64_ROUND_UP(vtime - now->vnow,
now->vrate) * NSEC_PER_USEC;
delta_ns = DIV64_U64_ROUND_UP(vtime - now->vnow,
now->vrate) * NSEC_PER_USEC;
blkcg_set_delay(blkg, delta_ns);
expires = now->now_ns + delta_ns;
/* if already active and close enough, don't bother */
oexpires = ktime_to_ns(hrtimer_get_softexpires(&iocg->delay_timer));
@ -1265,7 +1261,7 @@ static enum hrtimer_restart iocg_delay_timer_fn(struct hrtimer *timer)
spin_lock_irqsave(&iocg->waitq.lock, flags);
ioc_now(iocg->ioc, &now);
iocg_kick_delay(iocg, &now, 0);
iocg_kick_delay(iocg, &now);
spin_unlock_irqrestore(&iocg->waitq.lock, flags);
return HRTIMER_NORESTART;
@ -1383,7 +1379,7 @@ static void ioc_timer_fn(struct timer_list *timer)
if (waitqueue_active(&iocg->waitq) || iocg->abs_vdebt) {
/* might be oversleeping vtime / hweight changes, kick */
iocg_kick_waitq(iocg, &now);
iocg_kick_delay(iocg, &now, 0);
iocg_kick_delay(iocg, &now);
} else if (iocg_is_idle(iocg)) {
/* no waiter and idle, deactivate */
iocg->last_inuse = iocg->inuse;
@ -1543,19 +1539,39 @@ skip_surplus_transfers:
if (rq_wait_pct > RQ_WAIT_BUSY_PCT ||
missed_ppm[READ] > ppm_rthr ||
missed_ppm[WRITE] > ppm_wthr) {
/* clearly missing QoS targets, slow down vrate */
ioc->busy_level = max(ioc->busy_level, 0);
ioc->busy_level++;
} else if (rq_wait_pct <= RQ_WAIT_BUSY_PCT * UNBUSY_THR_PCT / 100 &&
missed_ppm[READ] <= ppm_rthr * UNBUSY_THR_PCT / 100 &&
missed_ppm[WRITE] <= ppm_wthr * UNBUSY_THR_PCT / 100) {
/* take action iff there is contention */
if (nr_shortages && !nr_lagging) {
/* QoS targets are being met with >25% margin */
if (nr_shortages) {
/*
* We're throttling while the device has spare
* capacity. If vrate was being slowed down, stop.
*/
ioc->busy_level = min(ioc->busy_level, 0);
/* redistribute surpluses first */
if (!nr_surpluses)
/*
* If there are IOs spanning multiple periods, wait
* them out before pushing the device harder. If
* there are surpluses, let redistribution work it
* out first.
*/
if (!nr_lagging && !nr_surpluses)
ioc->busy_level--;
} else {
/*
* Nobody is being throttled and the users aren't
* issuing enough IOs to saturate the device. We
* simply don't know how close the device is to
* saturation. Coast.
*/
ioc->busy_level = 0;
}
} else {
/* inside the hysterisis margin, we're good */
ioc->busy_level = 0;
}
@ -1678,6 +1694,31 @@ static u64 calc_vtime_cost(struct bio *bio, struct ioc_gq *iocg, bool is_merge)
return cost;
}
static void calc_size_vtime_cost_builtin(struct request *rq, struct ioc *ioc,
u64 *costp)
{
unsigned int pages = blk_rq_stats_sectors(rq) >> IOC_SECT_TO_PAGE_SHIFT;
switch (req_op(rq)) {
case REQ_OP_READ:
*costp = pages * ioc->params.lcoefs[LCOEF_RPAGE];
break;
case REQ_OP_WRITE:
*costp = pages * ioc->params.lcoefs[LCOEF_WPAGE];
break;
default:
*costp = 0;
}
}
static u64 calc_size_vtime_cost(struct request *rq, struct ioc *ioc)
{
u64 cost;
calc_size_vtime_cost_builtin(rq, ioc, &cost);
return cost;
}
static void ioc_rqos_throttle(struct rq_qos *rqos, struct bio *bio)
{
struct blkcg_gq *blkg = bio->bi_blkg;
@ -1762,7 +1803,7 @@ static void ioc_rqos_throttle(struct rq_qos *rqos, struct bio *bio)
*/
if (bio_issue_as_root_blkg(bio) || fatal_signal_pending(current)) {
iocg->abs_vdebt += abs_cost;
if (iocg_kick_delay(iocg, &now, cost))
if (iocg_kick_delay(iocg, &now))
blkcg_schedule_throttle(rqos->q,
(bio->bi_opf & REQ_SWAP) == REQ_SWAP);
spin_unlock_irq(&iocg->waitq.lock);
@ -1850,7 +1891,7 @@ static void ioc_rqos_merge(struct rq_qos *rqos, struct request *rq,
spin_lock_irqsave(&iocg->waitq.lock, flags);
if (likely(!list_empty(&iocg->active_list))) {
iocg->abs_vdebt += abs_cost;
iocg_kick_delay(iocg, &now, cost);
iocg_kick_delay(iocg, &now);
} else {
iocg_commit_bio(iocg, bio, cost);
}
@ -1868,7 +1909,7 @@ static void ioc_rqos_done_bio(struct rq_qos *rqos, struct bio *bio)
static void ioc_rqos_done(struct rq_qos *rqos, struct request *rq)
{
struct ioc *ioc = rqos_to_ioc(rqos);
u64 on_q_ns, rq_wait_ns;
u64 on_q_ns, rq_wait_ns, size_nsec;
int pidx, rw;
if (!ioc->enabled || !rq->alloc_time_ns || !rq->start_time_ns)
@ -1889,8 +1930,10 @@ static void ioc_rqos_done(struct rq_qos *rqos, struct request *rq)
on_q_ns = ktime_get_ns() - rq->alloc_time_ns;
rq_wait_ns = rq->start_time_ns - rq->alloc_time_ns;
size_nsec = div64_u64(calc_size_vtime_cost(rq, ioc), VTIME_PER_NSEC);
if (on_q_ns <= ioc->params.qos[pidx] * NSEC_PER_USEC)
if (on_q_ns <= size_nsec ||
on_q_ns - size_nsec <= ioc->params.qos[pidx] * NSEC_PER_USEC)
this_cpu_inc(ioc->pcpu_stat->missed[rw].nr_met);
else
this_cpu_inc(ioc->pcpu_stat->missed[rw].nr_missed);
@ -2297,6 +2340,7 @@ static ssize_t ioc_qos_write(struct kernfs_open_file *of, char *input,
spin_lock_irq(&ioc->lock);
if (enable) {
blk_stat_enable_accounting(ioc->rqos.q);
blk_queue_flag_set(QUEUE_FLAG_RQ_ALLOC_TIME, ioc->rqos.q);
ioc->enabled = true;
} else {

15
block/blk-map.c
View File

@ -257,6 +257,7 @@ out_bmd:
static struct bio *bio_map_user_iov(struct request_queue *q,
struct iov_iter *iter, gfp_t gfp_mask)
{
unsigned int max_sectors = queue_max_hw_sectors(q);
int j;
struct bio *bio;
int ret;
@ -294,8 +295,8 @@ static struct bio *bio_map_user_iov(struct request_queue *q,
if (n > bytes)
n = bytes;
if (!__bio_add_pc_page(q, bio, page, n, offs,
&same_page)) {
if (!bio_add_hw_page(q, bio, page, n, offs,
max_sectors, &same_page)) {
if (same_page)
put_page(page);
break;
@ -549,6 +550,7 @@ int blk_rq_append_bio(struct request *rq, struct bio **bio)
rq->biotail->bi_next = *bio;
rq->biotail = *bio;
rq->__data_len += (*bio)->bi_iter.bi_size;
bio_crypt_free_ctx(*bio);
}
return 0;
@ -654,8 +656,6 @@ int blk_rq_map_user_iov(struct request_queue *q, struct request *rq,
bio = rq->bio;
} while (iov_iter_count(&i));
if (!bio_flagged(bio, BIO_USER_MAPPED))
rq->rq_flags |= RQF_COPY_USER;
return 0;
unmap_rq:
@ -731,7 +731,6 @@ int blk_rq_map_kern(struct request_queue *q, struct request *rq, void *kbuf,
{
int reading = rq_data_dir(rq) == READ;
unsigned long addr = (unsigned long) kbuf;
int do_copy = 0;
struct bio *bio, *orig_bio;
int ret;
@ -740,8 +739,7 @@ int blk_rq_map_kern(struct request_queue *q, struct request *rq, void *kbuf,
if (!len || !kbuf)
return -EINVAL;
do_copy = !blk_rq_aligned(q, addr, len) || object_is_on_stack(kbuf);
if (do_copy)
if (!blk_rq_aligned(q, addr, len) || object_is_on_stack(kbuf))
bio = bio_copy_kern(q, kbuf, len, gfp_mask, reading);
else
bio = bio_map_kern(q, kbuf, len, gfp_mask);
@ -752,9 +750,6 @@ int blk_rq_map_kern(struct request_queue *q, struct request *rq, void *kbuf,
bio->bi_opf &= ~REQ_OP_MASK;
bio->bi_opf |= req_op(rq);
if (do_copy)
rq->rq_flags |= RQF_COPY_USER;
orig_bio = bio;
ret = blk_rq_append_bio(rq, &bio);
if (unlikely(ret)) {

76
block/blk-merge.c
View File

@ -336,16 +336,6 @@ void __blk_queue_split(struct request_queue *q, struct bio **bio,
/* there isn't chance to merge the splitted bio */
split->bi_opf |= REQ_NOMERGE;
/*
* Since we're recursing into make_request here, ensure
* that we mark this bio as already having entered the queue.
* If not, and the queue is going away, we can get stuck
* forever on waiting for the queue reference to drop. But
* that will never happen, as we're already holding a
* reference to it.
*/
bio_set_flag(*bio, BIO_QUEUE_ENTERED);
bio_chain(split, *bio);
trace_block_split(q, split, (*bio)->bi_iter.bi_sector);
generic_make_request(*bio);
@ -519,44 +509,20 @@ static int __blk_bios_map_sg(struct request_queue *q, struct bio *bio,
* map a request to scatterlist, return number of sg entries setup. Caller
* must make sure sg can hold rq->nr_phys_segments entries
*/
int blk_rq_map_sg(struct request_queue *q, struct request *rq,
struct scatterlist *sglist)
int __blk_rq_map_sg(struct request_queue *q, struct request *rq,
struct scatterlist *sglist, struct scatterlist **last_sg)
{
struct scatterlist *sg = NULL;
int nsegs = 0;
if (rq->rq_flags & RQF_SPECIAL_PAYLOAD)
nsegs = __blk_bvec_map_sg(rq->special_vec, sglist, &sg);
nsegs = __blk_bvec_map_sg(rq->special_vec, sglist, last_sg);
else if (rq->bio && bio_op(rq->bio) == REQ_OP_WRITE_SAME)
nsegs = __blk_bvec_map_sg(bio_iovec(rq->bio), sglist, &sg);
nsegs = __blk_bvec_map_sg(bio_iovec(rq->bio), sglist, last_sg);
else if (rq->bio)
nsegs = __blk_bios_map_sg(q, rq->bio, sglist, &sg);
nsegs = __blk_bios_map_sg(q, rq->bio, sglist, last_sg);
if (unlikely(rq->rq_flags & RQF_COPY_USER) &&
(blk_rq_bytes(rq) & q->dma_pad_mask)) {
unsigned int pad_len =
(q->dma_pad_mask & ~blk_rq_bytes(rq)) + 1;
sg->length += pad_len;
rq->extra_len += pad_len;
}
if (q->dma_drain_size && q->dma_drain_needed(rq)) {
if (op_is_write(req_op(rq)))
memset(q->dma_drain_buffer, 0, q->dma_drain_size);
sg_unmark_end(sg);
sg = sg_next(sg);
sg_set_page(sg, virt_to_page(q->dma_drain_buffer),
q->dma_drain_size,
((unsigned long)q->dma_drain_buffer) &
(PAGE_SIZE - 1));
nsegs++;
rq->extra_len += q->dma_drain_size;
}
if (sg)
sg_mark_end(sg);
if (*last_sg)
sg_mark_end(*last_sg);
/*
* Something must have been wrong if the figured number of
@ -566,7 +532,7 @@ int blk_rq_map_sg(struct request_queue *q, struct request *rq,
return nsegs;
}
EXPORT_SYMBOL(blk_rq_map_sg);
EXPORT_SYMBOL(__blk_rq_map_sg);
static inline int ll_new_hw_segment(struct request *req, struct bio *bio,
unsigned int nr_phys_segs)
@ -596,6 +562,8 @@ int ll_back_merge_fn(struct request *req, struct bio *bio, unsigned int nr_segs)
if (blk_integrity_rq(req) &&
integrity_req_gap_back_merge(req, bio))
return 0;
if (!bio_crypt_ctx_back_mergeable(req, bio))
return 0;
if (blk_rq_sectors(req) + bio_sectors(bio) >
blk_rq_get_max_sectors(req, blk_rq_pos(req))) {
req_set_nomerge(req->q, req);
@ -612,6 +580,8 @@ int ll_front_merge_fn(struct request *req, struct bio *bio, unsigned int nr_segs
if (blk_integrity_rq(req) &&
integrity_req_gap_front_merge(req, bio))
return 0;
if (!bio_crypt_ctx_front_mergeable(req, bio))
return 0;
if (blk_rq_sectors(req) + bio_sectors(bio) >
blk_rq_get_max_sectors(req, bio->bi_iter.bi_sector)) {
req_set_nomerge(req->q, req);
@ -661,6 +631,9 @@ static int ll_merge_requests_fn(struct request_queue *q, struct request *req,
if (blk_integrity_merge_rq(q, req, next) == false)
return 0;
if (!bio_crypt_ctx_merge_rq(req, next))
return 0;
/* Merge is OK... */
req->nr_phys_segments = total_phys_segments;
return 1;
@ -696,20 +669,17 @@ void blk_rq_set_mixed_merge(struct request *rq)
rq->rq_flags |= RQF_MIXED_MERGE;
}
static void blk_account_io_merge(struct request *req)
static void blk_account_io_merge_request(struct request *req)
{
if (blk_do_io_stat(req)) {
struct hd_struct *part;
part_stat_lock();
part = req->part;
part_dec_in_flight(req->q, part, rq_data_dir(req));
hd_struct_put(part);
part_stat_inc(req->part, merges[op_stat_group(req_op(req))]);
part_stat_unlock();
hd_struct_put(req->part);
}
}
/*
* Two cases of handling DISCARD merge:
* If max_discard_segments > 1, the driver takes every bio
@ -821,7 +791,7 @@ static struct request *attempt_merge(struct request_queue *q,
/*
* 'next' is going away, so update stats accordingly
*/
blk_account_io_merge(next);
blk_account_io_merge_request(next);
/*
* ownership of bio passed from next to req, return 'next' for
@ -885,6 +855,10 @@ bool blk_rq_merge_ok(struct request *rq, struct bio *bio)
if (blk_integrity_merge_bio(rq->q, rq, bio) == false)
return false;
/* Only merge if the crypt contexts are compatible */
if (!bio_crypt_rq_ctx_compatible(rq, bio))
return false;
/* must be using the same buffer */
if (req_op(rq) == REQ_OP_WRITE_SAME &&
!blk_write_same_mergeable(rq->bio, bio))

3
block/blk-mq-debugfs.c
View File

@ -213,6 +213,7 @@ static const char *const hctx_state_name[] = {
HCTX_STATE_NAME(STOPPED),
HCTX_STATE_NAME(TAG_ACTIVE),
HCTX_STATE_NAME(SCHED_RESTART),
HCTX_STATE_NAME(INACTIVE),
};
#undef HCTX_STATE_NAME
@ -239,6 +240,7 @@ static const char *const hctx_flag_name[] = {
HCTX_FLAG_NAME(TAG_SHARED),
HCTX_FLAG_NAME(BLOCKING),
HCTX_FLAG_NAME(NO_SCHED),
HCTX_FLAG_NAME(STACKING),
};
#undef HCTX_FLAG_NAME
@ -292,7 +294,6 @@ static const char *const rqf_name[] = {
RQF_NAME(MQ_INFLIGHT),
RQF_NAME(DONTPREP),
RQF_NAME(PREEMPT),
RQF_NAME(COPY_USER),
RQF_NAME(FAILED),
RQF_NAME(QUIET),
RQF_NAME(ELVPRIV),

82
block/blk-mq-sched.c
View File

@ -80,16 +80,22 @@ void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx)
blk_mq_run_hw_queue(hctx, true);
}
#define BLK_MQ_BUDGET_DELAY 3 /* ms units */
/*
* Only SCSI implements .get_budget and .put_budget, and SCSI restarts
* its queue by itself in its completion handler, so we don't need to
* restart queue if .get_budget() returns BLK_STS_NO_RESOURCE.
*
* Returns -EAGAIN if hctx->dispatch was found non-empty and run_work has to
* be run again. This is necessary to avoid starving flushes.
*/
static void blk_mq_do_dispatch_sched(struct blk_mq_hw_ctx *hctx)
static int blk_mq_do_dispatch_sched(struct blk_mq_hw_ctx *hctx)
{
struct request_queue *q = hctx->queue;
struct elevator_queue *e = q->elevator;
LIST_HEAD(rq_list);
int ret = 0;
do {
struct request *rq;
@ -97,12 +103,25 @@ static void blk_mq_do_dispatch_sched(struct blk_mq_hw_ctx *hctx)
if (e->type->ops.has_work && !e->type->ops.has_work(hctx))
break;
if (!list_empty_careful(&hctx->dispatch)) {
ret = -EAGAIN;
break;
}
if (!blk_mq_get_dispatch_budget(hctx))
break;
rq = e->type->ops.dispatch_request(hctx);
if (!rq) {
blk_mq_put_dispatch_budget(hctx);
/*
* We're releasing without dispatching. Holding the
* budget could have blocked any "hctx"s with the
* same queue and if we didn't dispatch then there's
* no guarantee anyone will kick the queue. Kick it
* ourselves.
*/
blk_mq_delay_run_hw_queues(q, BLK_MQ_BUDGET_DELAY);
break;
}
@ -113,6 +132,8 @@ static void blk_mq_do_dispatch_sched(struct blk_mq_hw_ctx *hctx)
*/
list_add(&rq->queuelist, &rq_list);
} while (blk_mq_dispatch_rq_list(q, &rq_list, true));
return ret;
}
static struct blk_mq_ctx *blk_mq_next_ctx(struct blk_mq_hw_ctx *hctx,
@ -130,16 +151,25 @@ static struct blk_mq_ctx *blk_mq_next_ctx(struct blk_mq_hw_ctx *hctx,
* Only SCSI implements .get_budget and .put_budget, and SCSI restarts
* its queue by itself in its completion handler, so we don't need to
* restart queue if .get_budget() returns BLK_STS_NO_RESOURCE.
*
* Returns -EAGAIN if hctx->dispatch was found non-empty and run_work has to
* to be run again. This is necessary to avoid starving flushes.
*/
static void blk_mq_do_dispatch_ctx(struct blk_mq_hw_ctx *hctx)
static int blk_mq_do_dispatch_ctx(struct blk_mq_hw_ctx *hctx)
{
struct request_queue *q = hctx->queue;
LIST_HEAD(rq_list);
struct blk_mq_ctx *ctx = READ_ONCE(hctx->dispatch_from);
int ret = 0;
do {
struct request *rq;
if (!list_empty_careful(&hctx->dispatch)) {
ret = -EAGAIN;
break;
}
if (!sbitmap_any_bit_set(&hctx->ctx_map))
break;
@ -149,6 +179,14 @@ static void blk_mq_do_dispatch_ctx(struct blk_mq_hw_ctx *hctx)
rq = blk_mq_dequeue_from_ctx(hctx, ctx);
if (!rq) {
blk_mq_put_dispatch_budget(hctx);
/*
* We're releasing without dispatching. Holding the
* budget could have blocked any "hctx"s with the
* same queue and if we didn't dispatch then there's
* no guarantee anyone will kick the queue. Kick it
* ourselves.
*/
blk_mq_delay_run_hw_queues(q, BLK_MQ_BUDGET_DELAY);
break;
}
@ -165,21 +203,17 @@ static void blk_mq_do_dispatch_ctx(struct blk_mq_hw_ctx *hctx)
} while (blk_mq_dispatch_rq_list(q, &rq_list, true));
WRITE_ONCE(hctx->dispatch_from, ctx);
return ret;
}
void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx)
static int __blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx)
{
struct request_queue *q = hctx->queue;
struct elevator_queue *e = q->elevator;
const bool has_sched_dispatch = e && e->type->ops.dispatch_request;
int ret = 0;
LIST_HEAD(rq_list);
/* RCU or SRCU read lock is needed before checking quiesced flag */
if (unlikely(blk_mq_hctx_stopped(hctx) || blk_queue_quiesced(q)))
return;
hctx->run++;
/*
* If we have previous entries on our dispatch list, grab them first for
* more fair dispatch.
@ -208,19 +242,41 @@ void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx)
blk_mq_sched_mark_restart_hctx(hctx);
if (blk_mq_dispatch_rq_list(q, &rq_list, false)) {
if (has_sched_dispatch)
blk_mq_do_dispatch_sched(hctx);
ret = blk_mq_do_dispatch_sched(hctx);
else
blk_mq_do_dispatch_ctx(hctx);
ret = blk_mq_do_dispatch_ctx(hctx);
}
} else if (has_sched_dispatch) {
blk_mq_do_dispatch_sched(hctx);
ret = blk_mq_do_dispatch_sched(hctx);
} else if (hctx->dispatch_busy) {
/* dequeue request one by one from sw queue if queue is busy */
blk_mq_do_dispatch_ctx(hctx);
ret = blk_mq_do_dispatch_ctx(hctx);
} else {
blk_mq_flush_busy_ctxs(hctx, &rq_list);
blk_mq_dispatch_rq_list(q, &rq_list, false);
}
return ret;
}
void blk_mq_sched_dispatch_requests(struct blk_mq_hw_ctx *hctx)
{
struct request_queue *q = hctx->queue;
/* RCU or SRCU read lock is needed before checking quiesced flag */
if (unlikely(blk_mq_hctx_stopped(hctx) || blk_queue_quiesced(q)))
return;
hctx->run++;
/*
* A return of -EAGAIN is an indication that hctx->dispatch is not
* empty and we must run again in order to avoid starving flushes.
*/
if (__blk_mq_sched_dispatch_requests(hctx) == -EAGAIN) {
if (__blk_mq_sched_dispatch_requests(hctx) == -EAGAIN)
blk_mq_run_hw_queue(hctx, true);
}
}
bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio,

70
block/blk-mq-tag.c
View File

@ -92,7 +92,7 @@ static int __blk_mq_get_tag(struct blk_mq_alloc_data *data,
{
if (!(data->flags & BLK_MQ_REQ_INTERNAL) &&
!hctx_may_queue(data->hctx, bt))
return -1;
return BLK_MQ_NO_TAG;
if (data->shallow_depth)
return __sbitmap_queue_get_shallow(bt, data->shallow_depth);
else
@ -111,7 +111,7 @@ unsigned int blk_mq_get_tag(struct blk_mq_alloc_data *data)
if (data->flags & BLK_MQ_REQ_RESERVED) {
if (unlikely(!tags->nr_reserved_tags)) {
WARN_ON_ONCE(1);
return BLK_MQ_TAG_FAIL;
return BLK_MQ_NO_TAG;
}
bt = &tags->breserved_tags;
tag_offset = 0;
@ -121,11 +121,11 @@ unsigned int blk_mq_get_tag(struct blk_mq_alloc_data *data)
}
tag = __blk_mq_get_tag(data, bt);
if (tag != -1)
if (tag != BLK_MQ_NO_TAG)
goto found_tag;
if (data->flags & BLK_MQ_REQ_NOWAIT)
return BLK_MQ_TAG_FAIL;
return BLK_MQ_NO_TAG;
ws = bt_wait_ptr(bt, data->hctx);
do {
@ -143,13 +143,13 @@ unsigned int blk_mq_get_tag(struct blk_mq_alloc_data *data)
* as running the queue may also have found completions.
*/
tag = __blk_mq_get_tag(data, bt);
if (tag != -1)
if (tag != BLK_MQ_NO_TAG)
break;
sbitmap_prepare_to_wait(bt, ws, &wait, TASK_UNINTERRUPTIBLE);
tag = __blk_mq_get_tag(data, bt);
if (tag != -1)
if (tag != BLK_MQ_NO_TAG)
break;
bt_prev = bt;
@ -180,6 +180,14 @@ unsigned int blk_mq_get_tag(struct blk_mq_alloc_data *data)
sbitmap_finish_wait(bt, ws, &wait);
found_tag:
/*
* Give up this allocation if the hctx is inactive. The caller will
* retry on an active hctx.
*/
if (unlikely(test_bit(BLK_MQ_S_INACTIVE, &data->hctx->state))) {
blk_mq_put_tag(tags, data->ctx, tag + tag_offset);
return BLK_MQ_NO_TAG;
}
return tag + tag_offset;
}
@ -256,14 +264,17 @@ struct bt_tags_iter_data {
struct blk_mq_tags *tags;
busy_tag_iter_fn *fn;
void *data;
bool reserved;
unsigned int flags;
};
#define BT_TAG_ITER_RESERVED (1 << 0)
#define BT_TAG_ITER_STARTED (1 << 1)
static bool bt_tags_iter(struct sbitmap *bitmap, unsigned int bitnr, void *data)
{
struct bt_tags_iter_data *iter_data = data;
struct blk_mq_tags *tags = iter_data->tags;
bool reserved = iter_data->reserved;
bool reserved = iter_data->flags & BT_TAG_ITER_RESERVED;
struct request *rq;
if (!reserved)
@ -274,10 +285,12 @@ static bool bt_tags_iter(struct sbitmap *bitmap, unsigned int bitnr, void *data)
* test and set the bit before assining ->rqs[].
*/
rq = tags->rqs[bitnr];
if (rq && blk_mq_request_started(rq))
return iter_data->fn(rq, iter_data->data, reserved);
return true;
if (!rq)
return true;
if ((iter_data->flags & BT_TAG_ITER_STARTED) &&
!blk_mq_request_started(rq))
return true;
return iter_data->fn(rq, iter_data->data, reserved);
}
/**
@ -290,39 +303,47 @@ static bool bt_tags_iter(struct sbitmap *bitmap, unsigned int bitnr, void *data)
* @reserved) where rq is a pointer to a request. Return true
* to continue iterating tags, false to stop.
* @data: Will be passed as second argument to @fn.
* @reserved: Indicates whether @bt is the breserved_tags member or the
* bitmap_tags member of struct blk_mq_tags.
* @flags: BT_TAG_ITER_*
*/
static void bt_tags_for_each(struct blk_mq_tags *tags, struct sbitmap_queue *bt,
busy_tag_iter_fn *fn, void *data, bool reserved)
busy_tag_iter_fn *fn, void *data, unsigned int flags)
{
struct bt_tags_iter_data iter_data = {
.tags = tags,
.fn = fn,
.data = data,
.reserved = reserved,
.flags = flags,
};
if (tags->rqs)
sbitmap_for_each_set(&bt->sb, bt_tags_iter, &iter_data);
}
static void __blk_mq_all_tag_iter(struct blk_mq_tags *tags,
busy_tag_iter_fn *fn, void *priv, unsigned int flags)
{
WARN_ON_ONCE(flags & BT_TAG_ITER_RESERVED);
if (tags->nr_reserved_tags)
bt_tags_for_each(tags, &tags->breserved_tags, fn, priv,
flags | BT_TAG_ITER_RESERVED);
bt_tags_for_each(tags, &tags->bitmap_tags, fn, priv, flags);
}
/**
* blk_mq_all_tag_busy_iter - iterate over all started requests in a tag map
* blk_mq_all_tag_iter - iterate over all requests in a tag map
* @tags: Tag map to iterate over.
* @fn: Pointer to the function that will be called for each started
* @fn: Pointer to the function that will be called for each
* request. @fn will be called as follows: @fn(rq, @priv,
* reserved) where rq is a pointer to a request. 'reserved'
* indicates whether or not @rq is a reserved request. Return
* true to continue iterating tags, false to stop.
* @priv: Will be passed as second argument to @fn.
*/
static void blk_mq_all_tag_busy_iter(struct blk_mq_tags *tags,
busy_tag_iter_fn *fn, void *priv)
void blk_mq_all_tag_iter(struct blk_mq_tags *tags, busy_tag_iter_fn *fn,
void *priv)
{
if (tags->nr_reserved_tags)
bt_tags_for_each(tags, &tags->breserved_tags, fn, priv, true);
bt_tags_for_each(tags, &tags->bitmap_tags, fn, priv, false);
return __blk_mq_all_tag_iter(tags, fn, priv, 0);
}
/**
@ -342,7 +363,8 @@ void blk_mq_tagset_busy_iter(struct blk_mq_tag_set *tagset,
for (i = 0; i < tagset->nr_hw_queues; i++) {
if (tagset->tags && tagset->tags[i])
blk_mq_all_tag_busy_iter(tagset->tags[i], fn, priv);
__blk_mq_all_tag_iter(tagset->tags[i], fn, priv,
BT_TAG_ITER_STARTED);
}
}
EXPORT_SYMBOL(blk_mq_tagset_busy_iter);

6
block/blk-mq-tag.h
View File

@ -34,6 +34,8 @@ extern int blk_mq_tag_update_depth(struct blk_mq_hw_ctx *hctx,
extern void blk_mq_tag_wakeup_all(struct blk_mq_tags *tags, bool);
void blk_mq_queue_tag_busy_iter(struct request_queue *q, busy_iter_fn *fn,
void *priv);
void blk_mq_all_tag_iter(struct blk_mq_tags *tags, busy_tag_iter_fn *fn,
void *priv);
static inline struct sbq_wait_state *bt_wait_ptr(struct sbitmap_queue *bt,
struct blk_mq_hw_ctx *hctx)
@ -44,9 +46,9 @@ static inline struct sbq_wait_state *bt_wait_ptr(struct sbitmap_queue *bt,
}
enum {
BLK_MQ_TAG_FAIL = -1U,
BLK_MQ_NO_TAG = -1U,
BLK_MQ_TAG_MIN = 1,
BLK_MQ_TAG_MAX = BLK_MQ_TAG_FAIL - 1,
BLK_MQ_TAG_MAX = BLK_MQ_NO_TAG - 1,
};
extern bool __blk_mq_tag_busy(struct blk_mq_hw_ctx *);

407
block/blk-mq.c
View File

@ -26,6 +26,7 @@
#include <linux/delay.h>
#include <linux/crash_dump.h>
#include <linux/prefetch.h>
#include <linux/blk-crypto.h>
#include <trace/events/block.h>
@ -270,14 +271,14 @@ static inline bool blk_mq_need_time_stamp(struct request *rq)
}
static struct request *blk_mq_rq_ctx_init(struct blk_mq_alloc_data *data,
unsigned int tag, unsigned int op, u64 alloc_time_ns)
unsigned int tag, u64 alloc_time_ns)
{
struct blk_mq_tags *tags = blk_mq_tags_from_data(data);
struct request *rq = tags->static_rqs[tag];
req_flags_t rq_flags = 0;
if (data->flags & BLK_MQ_REQ_INTERNAL) {
rq->tag = -1;
rq->tag = BLK_MQ_NO_TAG;
rq->internal_tag = tag;
} else {
if (data->hctx->flags & BLK_MQ_F_TAG_SHARED) {
@ -285,7 +286,7 @@ static struct request *blk_mq_rq_ctx_init(struct blk_mq_alloc_data *data,
atomic_inc(&data->hctx->nr_active);
}
rq->tag = tag;
rq->internal_tag = -1;
rq->internal_tag = BLK_MQ_NO_TAG;
data->hctx->tags->rqs[rq->tag] = rq;
}
@ -294,7 +295,7 @@ static struct request *blk_mq_rq_ctx_init(struct blk_mq_alloc_data *data,
rq->mq_ctx = data->ctx;
rq->mq_hctx = data->hctx;
rq->rq_flags = rq_flags;
rq->cmd_flags = op;
rq->cmd_flags = data->cmd_flags;
if (data->flags & BLK_MQ_REQ_PREEMPT)
rq->rq_flags |= RQF_PREEMPT;
if (blk_queue_io_stat(data->q))
@ -317,8 +318,8 @@ static struct request *blk_mq_rq_ctx_init(struct blk_mq_alloc_data *data,
#if defined(CONFIG_BLK_DEV_INTEGRITY)
rq->nr_integrity_segments = 0;
#endif
blk_crypto_rq_set_defaults(rq);
/* tag was already set */
rq->extra_len = 0;
WRITE_ONCE(rq->deadline, 0);
rq->timeout = 0;
@ -326,35 +327,37 @@ static struct request *blk_mq_rq_ctx_init(struct blk_mq_alloc_data *data,
rq->end_io = NULL;
rq->end_io_data = NULL;
data->ctx->rq_dispatched[op_is_sync(op)]++;
data->ctx->rq_dispatched[op_is_sync(data->cmd_flags)]++;
refcount_set(&rq->ref, 1);
if (!op_is_flush(data->cmd_flags)) {
struct elevator_queue *e = data->q->elevator;
rq->elv.icq = NULL;
if (e && e->type->ops.prepare_request) {
if (e->type->icq_cache)
blk_mq_sched_assign_ioc(rq);
e->type->ops.prepare_request(rq);
rq->rq_flags |= RQF_ELVPRIV;
}
}
data->hctx->queued++;
return rq;
}
static struct request *blk_mq_get_request(struct request_queue *q,
struct bio *bio,
struct blk_mq_alloc_data *data)
static struct request *__blk_mq_alloc_request(struct blk_mq_alloc_data *data)
{
struct request_queue *q = data->q;
struct elevator_queue *e = q->elevator;
struct request *rq;
unsigned int tag;
bool clear_ctx_on_error = false;
u64 alloc_time_ns = 0;
blk_queue_enter_live(q);
unsigned int tag;
/* alloc_time includes depth and tag waits */
if (blk_queue_rq_alloc_time(q))
alloc_time_ns = ktime_get_ns();
data->q = q;
if (likely(!data->ctx)) {
data->ctx = blk_mq_get_ctx(q);
clear_ctx_on_error = true;
}
if (likely(!data->hctx))
data->hctx = blk_mq_map_queue(q, data->cmd_flags,
data->ctx);
if (data->cmd_flags & REQ_NOWAIT)
data->flags |= BLK_MQ_REQ_NOWAIT;
@ -370,37 +373,43 @@ static struct request *blk_mq_get_request(struct request_queue *q,
e->type->ops.limit_depth &&
!(data->flags & BLK_MQ_REQ_RESERVED))
e->type->ops.limit_depth(data->cmd_flags, data);
} else {
}
retry:
data->ctx = blk_mq_get_ctx(q);
data->hctx = blk_mq_map_queue(q, data->cmd_flags, data->ctx);
if (!(data->flags & BLK_MQ_REQ_INTERNAL))
blk_mq_tag_busy(data->hctx);
}
/*
* Waiting allocations only fail because of an inactive hctx. In that
* case just retry the hctx assignment and tag allocation as CPU hotplug
* should have migrated us to an online CPU by now.
*/
tag = blk_mq_get_tag(data);
if (tag == BLK_MQ_TAG_FAIL) {
if (clear_ctx_on_error)
data->ctx = NULL;
blk_queue_exit(q);
return NULL;
}
if (tag == BLK_MQ_NO_TAG) {
if (data->flags & BLK_MQ_REQ_NOWAIT)
return NULL;
rq = blk_mq_rq_ctx_init(data, tag, data->cmd_flags, alloc_time_ns);
if (!op_is_flush(data->cmd_flags)) {
rq->elv.icq = NULL;
if (e && e->type->ops.prepare_request) {
if (e->type->icq_cache)
blk_mq_sched_assign_ioc(rq);
e->type->ops.prepare_request(rq, bio);
rq->rq_flags |= RQF_ELVPRIV;
}
/*
* Give up the CPU and sleep for a random short time to ensure
* that thread using a realtime scheduling class are migrated
* off the the CPU, and thus off the hctx that is going away.
*/
msleep(3);
goto retry;
}
data->hctx->queued++;
return rq;
return blk_mq_rq_ctx_init(data, tag, alloc_time_ns);
}
struct request *blk_mq_alloc_request(struct request_queue *q, unsigned int op,
blk_mq_req_flags_t flags)
{
struct blk_mq_alloc_data alloc_data = { .flags = flags, .cmd_flags = op };
struct blk_mq_alloc_data data = {
.q = q,
.flags = flags,
.cmd_flags = op,
};
struct request *rq;
int ret;
@ -408,34 +417,43 @@ struct request *blk_mq_alloc_request(struct request_queue *q, unsigned int op,
if (ret)
return ERR_PTR(ret);
rq = blk_mq_get_request(q, NULL, &alloc_data);
blk_queue_exit(q);
rq = __blk_mq_alloc_request(&data);
if (!rq)
return ERR_PTR(-EWOULDBLOCK);
goto out_queue_exit;
rq->__data_len = 0;
rq->__sector = (sector_t) -1;
rq->bio = rq->biotail = NULL;
return rq;
out_queue_exit:
blk_queue_exit(q);
return ERR_PTR(-EWOULDBLOCK);
}
EXPORT_SYMBOL(blk_mq_alloc_request);
struct request *blk_mq_alloc_request_hctx(struct request_queue *q,
unsigned int op, blk_mq_req_flags_t flags, unsigned int hctx_idx)
{
struct blk_mq_alloc_data alloc_data = { .flags = flags, .cmd_flags = op };
struct request *rq;
struct blk_mq_alloc_data data = {
.q = q,
.flags = flags,
.cmd_flags = op,
};
u64 alloc_time_ns = 0;
unsigned int cpu;
unsigned int tag;
int ret;
/* alloc_time includes depth and tag waits */
if (blk_queue_rq_alloc_time(q))
alloc_time_ns = ktime_get_ns();
/*
* If the tag allocator sleeps we could get an allocation for a
* different hardware context. No need to complicate the low level
* allocator for this for the rare use case of a command tied to
* a specific queue.
*/
if (WARN_ON_ONCE(!(flags & BLK_MQ_REQ_NOWAIT)))
if (WARN_ON_ONCE(!(flags & (BLK_MQ_REQ_NOWAIT | BLK_MQ_REQ_RESERVED))))
return ERR_PTR(-EINVAL);
if (hctx_idx >= q->nr_hw_queues)
@ -449,21 +467,27 @@ struct request *blk_mq_alloc_request_hctx(struct request_queue *q,
* Check if the hardware context is actually mapped to anything.
* If not tell the caller that it should skip this queue.
*/
alloc_data.hctx = q->queue_hw_ctx[hctx_idx];
if (!blk_mq_hw_queue_mapped(alloc_data.hctx)) {
blk_queue_exit(q);
return ERR_PTR(-EXDEV);
}
cpu = cpumask_first_and(alloc_data.hctx->cpumask, cpu_online_mask);
alloc_data.ctx = __blk_mq_get_ctx(q, cpu);
ret = -EXDEV;
data.hctx = q->queue_hw_ctx[hctx_idx];
if (!blk_mq_hw_queue_mapped(data.hctx))
goto out_queue_exit;
cpu = cpumask_first_and(data.hctx->cpumask, cpu_online_mask);
data.ctx = __blk_mq_get_ctx(q, cpu);
rq = blk_mq_get_request(q, NULL, &alloc_data);
if (q->elevator)
data.flags |= BLK_MQ_REQ_INTERNAL;
else
blk_mq_tag_busy(data.hctx);
ret = -EWOULDBLOCK;
tag = blk_mq_get_tag(&data);
if (tag == BLK_MQ_NO_TAG)
goto out_queue_exit;
return blk_mq_rq_ctx_init(&data, tag, alloc_time_ns);
out_queue_exit:
blk_queue_exit(q);
if (!rq)
return ERR_PTR(-EWOULDBLOCK);
return rq;
return ERR_PTR(ret);
}
EXPORT_SYMBOL_GPL(blk_mq_alloc_request_hctx);
@ -474,11 +498,12 @@ static void __blk_mq_free_request(struct request *rq)
struct blk_mq_hw_ctx *hctx = rq->mq_hctx;
const int sched_tag = rq->internal_tag;
blk_crypto_free_request(rq);
blk_pm_mark_last_busy(rq);
rq->mq_hctx = NULL;
if (rq->tag != -1)
if (rq->tag != BLK_MQ_NO_TAG)
blk_mq_put_tag(hctx->tags, ctx, rq->tag);
if (sched_tag != -1)
if (sched_tag != BLK_MQ_NO_TAG)
blk_mq_put_tag(hctx->sched_tags, ctx, sched_tag);
blk_mq_sched_restart(hctx);
blk_queue_exit(q);
@ -527,7 +552,7 @@ inline void __blk_mq_end_request(struct request *rq, blk_status_t error)
blk_stat_add(rq, now);
}
if (rq->internal_tag != -1)
if (rq->internal_tag != BLK_MQ_NO_TAG)
blk_mq_sched_completed_request(rq, now);
blk_account_io_done(rq, now);
@ -557,7 +582,17 @@ static void __blk_mq_complete_request_remote(void *data)
q->mq_ops->complete(rq);
}
static void __blk_mq_complete_request(struct request *rq)
/**
* blk_mq_force_complete_rq() - Force complete the request, bypassing any error
* injection that could drop the completion.
* @rq: Request to be force completed
*
* Drivers should use blk_mq_complete_request() to complete requests in their
* normal IO path. For timeout error recovery, drivers may call this forced
* completion routine after they've reclaimed timed out requests to bypass
* potentially subsequent fake timeouts.
*/
void blk_mq_force_complete_rq(struct request *rq)
{
struct blk_mq_ctx *ctx = rq->mq_ctx;
struct request_queue *q = rq->q;
@ -603,6 +638,7 @@ static void __blk_mq_complete_request(struct request *rq)
}
put_cpu();
}
EXPORT_SYMBOL_GPL(blk_mq_force_complete_rq);
static void hctx_unlock(struct blk_mq_hw_ctx *hctx, int srcu_idx)
__releases(hctx->srcu)
@ -636,7 +672,7 @@ bool blk_mq_complete_request(struct request *rq)
{
if (unlikely(blk_should_fake_timeout(rq->q)))
return false;
__blk_mq_complete_request(rq);
blk_mq_force_complete_rq(rq);
return true;
}
EXPORT_SYMBOL(blk_mq_complete_request);
@ -667,15 +703,6 @@ void blk_mq_start_request(struct request *rq)
blk_add_timer(rq);
WRITE_ONCE(rq->state, MQ_RQ_IN_FLIGHT);
if (q->dma_drain_size && blk_rq_bytes(rq)) {
/*
* Make sure space for the drain appears. We know we can do
* this because max_hw_segments has been adjusted to be one
* fewer than the device can handle.
*/
rq->nr_phys_segments++;
}
#ifdef CONFIG_BLK_DEV_INTEGRITY
if (blk_integrity_rq(rq) && req_op(rq) == REQ_OP_WRITE)
q->integrity.profile->prepare_fn(rq);
@ -695,8 +722,6 @@ static void __blk_mq_requeue_request(struct request *rq)
if (blk_mq_request_started(rq)) {
WRITE_ONCE(rq->state, MQ_RQ_IDLE);
rq->rq_flags &= ~RQF_TIMED_OUT;
if (q->dma_drain_size && blk_rq_bytes(rq))
rq->nr_phys_segments--;
}
}
@ -1037,7 +1062,7 @@ bool blk_mq_get_driver_tag(struct request *rq)
};
bool shared;
if (rq->tag != -1)
if (rq->tag != BLK_MQ_NO_TAG)
return true;
if (blk_mq_tag_is_reserved(data.hctx->sched_tags, rq->internal_tag))
@ -1053,7 +1078,7 @@ bool blk_mq_get_driver_tag(struct request *rq)
data.hctx->tags->rqs[rq->tag] = rq;
}
return rq->tag != -1;
return rq->tag != BLK_MQ_NO_TAG;
}
static int blk_mq_dispatch_wake(wait_queue_entry_t *wait, unsigned mode,
@ -1195,6 +1220,19 @@ static void blk_mq_handle_dev_resource(struct request *rq,
__blk_mq_requeue_request(rq);
}
static void blk_mq_handle_zone_resource(struct request *rq,
struct list_head *zone_list)
{
/*
* If we end up here it is because we cannot dispatch a request to a
* specific zone due to LLD level zone-write locking or other zone
* related resource not being available. In this case, set the request
* aside in zone_list for retrying it later.
*/
list_add(&rq->queuelist, zone_list);
__blk_mq_requeue_request(rq);
}
/*
* Returns true if we did some work AND can potentially do more.
*/
@ -1206,6 +1244,8 @@ bool blk_mq_dispatch_rq_list(struct request_queue *q, struct list_head *list,
bool no_tag = false;
int errors, queued;
blk_status_t ret = BLK_STS_OK;
bool no_budget_avail = false;
LIST_HEAD(zone_list);
if (list_empty(list))
return false;
@ -1224,6 +1264,7 @@ bool blk_mq_dispatch_rq_list(struct request_queue *q, struct list_head *list,
hctx = rq->mq_hctx;
if (!got_budget && !blk_mq_get_dispatch_budget(hctx)) {
blk_mq_put_driver_tag(rq);
no_budget_avail = true;
break;
}
@ -1266,6 +1307,16 @@ bool blk_mq_dispatch_rq_list(struct request_queue *q, struct list_head *list,
if (ret == BLK_STS_RESOURCE || ret == BLK_STS_DEV_RESOURCE) {
blk_mq_handle_dev_resource(rq, list);
break;
} else if (ret == BLK_STS_ZONE_RESOURCE) {
/*
* Move the request to zone_list and keep going through
* the dispatch list to find more requests the drive can
* accept.
*/
blk_mq_handle_zone_resource(rq, &zone_list);
if (list_empty(list))
break;
continue;
}
if (unlikely(ret != BLK_STS_OK)) {
@ -1277,6 +1328,9 @@ bool blk_mq_dispatch_rq_list(struct request_queue *q, struct list_head *list,
queued++;
} while (!list_empty(list));
if (!list_empty(&zone_list))
list_splice_tail_init(&zone_list, list);
hctx->dispatched[queued_to_index(queued)]++;
/*
@ -1320,13 +1374,15 @@ bool blk_mq_dispatch_rq_list(struct request_queue *q, struct list_head *list,
*
* If driver returns BLK_STS_RESOURCE and SCHED_RESTART
* bit is set, run queue after a delay to avoid IO stalls
* that could otherwise occur if the queue is idle.
* that could otherwise occur if the queue is idle. We'll do
* similar if we couldn't get budget and SCHED_RESTART is set.
*/
needs_restart = blk_mq_sched_needs_restart(hctx);
if (!needs_restart ||
(no_tag && list_empty_careful(&hctx->dispatch_wait.entry)))
blk_mq_run_hw_queue(hctx, true);
else if (needs_restart && (ret == BLK_STS_RESOURCE))
else if (needs_restart && (ret == BLK_STS_RESOURCE ||
no_budget_avail))
blk_mq_delay_run_hw_queue(hctx, BLK_MQ_RESOURCE_DELAY);
blk_mq_update_dispatch_busy(hctx, true);
@ -1541,6 +1597,25 @@ void blk_mq_run_hw_queues(struct request_queue *q, bool async)
}
EXPORT_SYMBOL(blk_mq_run_hw_queues);
/**
* blk_mq_delay_run_hw_queues - Run all hardware queues asynchronously.
* @q: Pointer to the request queue to run.
* @msecs: Microseconds of delay to wait before running the queues.
*/
void blk_mq_delay_run_hw_queues(struct request_queue *q, unsigned long msecs)
{
struct blk_mq_hw_ctx *hctx;
int i;
queue_for_each_hw_ctx(q, hctx, i) {
if (blk_mq_hctx_stopped(hctx))
continue;
blk_mq_delay_run_hw_queue(hctx, msecs);
}
}
EXPORT_SYMBOL(blk_mq_delay_run_hw_queues);
/**
* blk_mq_queue_stopped() - check whether one or more hctxs have been stopped
* @q: request queue.
@ -1782,8 +1857,9 @@ static void blk_mq_bio_to_request(struct request *rq, struct bio *bio,
rq->__sector = bio->bi_iter.bi_sector;
rq->write_hint = bio->bi_write_hint;
blk_rq_bio_prep(rq, bio, nr_segs);
blk_crypto_rq_bio_prep(rq, bio, GFP_NOIO);
blk_account_io_start(rq, true);
blk_account_io_start(rq);
}
static blk_status_t __blk_mq_issue_directly(struct blk_mq_hw_ctx *hctx,
@ -1973,39 +2049,42 @@ static void blk_add_rq_to_plug(struct blk_plug *plug, struct request *rq)
*
* Returns: Request queue cookie.
*/
static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio)
blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio)
{
const int is_sync = op_is_sync(bio->bi_opf);
const int is_flush_fua = op_is_flush(bio->bi_opf);
struct blk_mq_alloc_data data = { .flags = 0};
struct blk_mq_alloc_data data = {
.q = q,
};
struct request *rq;
struct blk_plug *plug;
struct request *same_queue_rq = NULL;
unsigned int nr_segs;
blk_qc_t cookie;
blk_status_t ret;
blk_queue_bounce(q, &bio);
__blk_queue_split(q, &bio, &nr_segs);
if (!bio_integrity_prep(bio))
return BLK_QC_T_NONE;
goto queue_exit;
if (!is_flush_fua && !blk_queue_nomerges(q) &&
blk_attempt_plug_merge(q, bio, nr_segs, &same_queue_rq))
return BLK_QC_T_NONE;
goto queue_exit;
if (blk_mq_sched_bio_merge(q, bio, nr_segs))
return BLK_QC_T_NONE;
goto queue_exit;
rq_qos_throttle(q, bio);
data.cmd_flags = bio->bi_opf;
rq = blk_mq_get_request(q, bio, &data);
rq = __blk_mq_alloc_request(&data);
if (unlikely(!rq)) {
rq_qos_cleanup(q, bio);
if (bio->bi_opf & REQ_NOWAIT)
bio_wouldblock_error(bio);
return BLK_QC_T_NONE;
goto queue_exit;
}
trace_block_getrq(q, bio, bio->bi_opf);
@ -2016,6 +2095,14 @@ static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio)
blk_mq_bio_to_request(rq, bio, nr_segs);
ret = blk_crypto_init_request(rq);
if (ret != BLK_STS_OK) {
bio->bi_status = ret;
bio_endio(bio);
blk_mq_free_request(rq);
return BLK_QC_T_NONE;
}
plug = blk_mq_plug(q, bio);
if (unlikely(is_flush_fua)) {
/* Bypass scheduler for flush requests */
@ -2084,7 +2171,11 @@ static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio)
}
return cookie;
queue_exit:
blk_queue_exit(q);
return BLK_QC_T_NONE;
}
EXPORT_SYMBOL_GPL(blk_mq_make_request); /* only for request based dm */
void blk_mq_free_rqs(struct blk_mq_tag_set *set, struct blk_mq_tags *tags,
unsigned int hctx_idx)
@ -2260,6 +2351,86 @@ fail:
return -ENOMEM;
}
struct rq_iter_data {
struct blk_mq_hw_ctx *hctx;
bool has_rq;
};
static bool blk_mq_has_request(struct request *rq, void *data, bool reserved)
{
struct rq_iter_data *iter_data = data;
if (rq->mq_hctx != iter_data->hctx)
return true;
iter_data->has_rq = true;
return false;
}
static bool blk_mq_hctx_has_requests(struct blk_mq_hw_ctx *hctx)
{
struct blk_mq_tags *tags = hctx->sched_tags ?
hctx->sched_tags : hctx->tags;
struct rq_iter_data data = {
.hctx = hctx,
};
blk_mq_all_tag_iter(tags, blk_mq_has_request, &data);
return data.has_rq;
}
static inline bool blk_mq_last_cpu_in_hctx(unsigned int cpu,
struct blk_mq_hw_ctx *hctx)
{
if (cpumask_next_and(-1, hctx->cpumask, cpu_online_mask) != cpu)
return false;
if (cpumask_next_and(cpu, hctx->cpumask, cpu_online_mask) < nr_cpu_ids)
return false;
return true;
}
static int blk_mq_hctx_notify_offline(unsigned int cpu, struct hlist_node *node)
{
struct blk_mq_hw_ctx *hctx = hlist_entry_safe(node,
struct blk_mq_hw_ctx, cpuhp_online);
if (!cpumask_test_cpu(cpu, hctx->cpumask) ||
!blk_mq_last_cpu_in_hctx(cpu, hctx))
return 0;
/*
* Prevent new request from being allocated on the current hctx.
*
* The smp_mb__after_atomic() Pairs with the implied barrier in
* test_and_set_bit_lock in sbitmap_get(). Ensures the inactive flag is
* seen once we return from the tag allocator.
*/
set_bit(BLK_MQ_S_INACTIVE, &hctx->state);
smp_mb__after_atomic();
/*
* Try to grab a reference to the queue and wait for any outstanding
* requests. If we could not grab a reference the queue has been
* frozen and there are no requests.
*/
if (percpu_ref_tryget(&hctx->queue->q_usage_counter)) {
while (blk_mq_hctx_has_requests(hctx))
msleep(5);
percpu_ref_put(&hctx->queue->q_usage_counter);
}
return 0;
}
static int blk_mq_hctx_notify_online(unsigned int cpu, struct hlist_node *node)
{
struct blk_mq_hw_ctx *hctx = hlist_entry_safe(node,
struct blk_mq_hw_ctx, cpuhp_online);
if (cpumask_test_cpu(cpu, hctx->cpumask))
clear_bit(BLK_MQ_S_INACTIVE, &hctx->state);
return 0;
}
/*
* 'cpu' is going away. splice any existing rq_list entries from this
* software queue to the hw queue dispatch list, and ensure that it
@ -2273,6 +2444,9 @@ static int blk_mq_hctx_notify_dead(unsigned int cpu, struct hlist_node *node)
enum hctx_type type;
hctx = hlist_entry_safe(node, struct blk_mq_hw_ctx, cpuhp_dead);
if (!cpumask_test_cpu(cpu, hctx->cpumask))
return 0;
ctx = __blk_mq_get_ctx(hctx->queue, cpu);
type = hctx->type;
@ -2296,6 +2470,9 @@ static int blk_mq_hctx_notify_dead(unsigned int cpu, struct hlist_node *node)
static void blk_mq_remove_cpuhp(struct blk_mq_hw_ctx *hctx)
{
if (!(hctx->flags & BLK_MQ_F_STACKING))
cpuhp_state_remove_instance_nocalls(CPUHP_AP_BLK_MQ_ONLINE,
&hctx->cpuhp_online);
cpuhp_state_remove_instance_nocalls(CPUHP_BLK_MQ_DEAD,
&hctx->cpuhp_dead);
}
@ -2355,6 +2532,9 @@ static int blk_mq_init_hctx(struct request_queue *q,
{
hctx->queue_num = hctx_idx;
if (!(hctx->flags & BLK_MQ_F_STACKING))
cpuhp_state_add_instance_nocalls(CPUHP_AP_BLK_MQ_ONLINE,
&hctx->cpuhp_online);
cpuhp_state_add_instance_nocalls(CPUHP_BLK_MQ_DEAD, &hctx->cpuhp_dead);
hctx->tags = set->tags[hctx_idx];
@ -2473,7 +2653,8 @@ static void blk_mq_init_cpu_queues(struct request_queue *q,
}
}
static bool __blk_mq_alloc_rq_map(struct blk_mq_tag_set *set, int hctx_idx)
static bool __blk_mq_alloc_map_and_request(struct blk_mq_tag_set *set,
int hctx_idx)
{
int ret = 0;
@ -2521,18 +2702,6 @@ static void blk_mq_map_swqueue(struct request_queue *q)
* If the cpu isn't present, the cpu is mapped to first hctx.
*/
for_each_possible_cpu(i) {
hctx_idx = set->map[HCTX_TYPE_DEFAULT].mq_map[i];
/* unmapped hw queue can be remapped after CPU topo changed */
if (!set->tags[hctx_idx] &&
!__blk_mq_alloc_rq_map(set, hctx_idx)) {
/*
* If tags initialization fail for some hctx,
* that hctx won't be brought online. In this
* case, remap the current ctx to hctx[0] which
* is guaranteed to always have tags allocated
*/
set->map[HCTX_TYPE_DEFAULT].mq_map[i] = 0;
}
ctx = per_cpu_ptr(q->queue_ctx, i);
for (j = 0; j < set->nr_maps; j++) {
@ -2541,6 +2710,18 @@ static void blk_mq_map_swqueue(struct request_queue *q)
HCTX_TYPE_DEFAULT, i);
continue;
}
hctx_idx = set->map[j].mq_map[i];
/* unmapped hw queue can be remapped after CPU topo changed */
if (!set->tags[hctx_idx] &&
!__blk_mq_alloc_map_and_request(set, hctx_idx)) {
/*
* If tags initialization fail for some hctx,
* that hctx won't be brought online. In this
* case, remap the current ctx to hctx[0] which
* is guaranteed to always have tags allocated
*/
set->map[j].mq_map[i] = 0;
}
hctx = blk_mq_map_queue_type(q, j, i);
ctx->hctxs[j] = hctx;
@ -2944,7 +3125,6 @@ struct request_queue *blk_mq_init_allocated_queue(struct blk_mq_tag_set *set,
INIT_LIST_HEAD(&q->requeue_list);
spin_lock_init(&q->requeue_lock);
q->make_request_fn = blk_mq_make_request;
q->nr_requests = set->queue_depth;
/*
@ -2988,14 +3168,14 @@ static int __blk_mq_alloc_rq_maps(struct blk_mq_tag_set *set)
int i;
for (i = 0; i < set->nr_hw_queues; i++)
if (!__blk_mq_alloc_rq_map(set, i))
if (!__blk_mq_alloc_map_and_request(set, i))
goto out_unwind;
return 0;
out_unwind:
while (--i >= 0)
blk_mq_free_rq_map(set->tags[i]);
blk_mq_free_map_and_requests(set, i);
return -ENOMEM;
}
@ -3005,7 +3185,7 @@ out_unwind:
* may reduce the depth asked for, if memory is tight. set->queue_depth
* will be updated to reflect the allocated depth.
*/
static int blk_mq_alloc_rq_maps(struct blk_mq_tag_set *set)
static int blk_mq_alloc_map_and_requests(struct blk_mq_tag_set *set)
{
unsigned int depth;
int err;
@ -3165,7 +3345,7 @@ int blk_mq_alloc_tag_set(struct blk_mq_tag_set *set)
if (ret)
goto out_free_mq_map;
ret = blk_mq_alloc_rq_maps(set);
ret = blk_mq_alloc_map_and_requests(set);
if (ret)
goto out_free_mq_map;
@ -3347,14 +3527,14 @@ static void __blk_mq_update_nr_hw_queues(struct blk_mq_tag_set *set,
blk_mq_sysfs_unregister(q);
}
prev_nr_hw_queues = set->nr_hw_queues;
if (blk_mq_realloc_tag_set_tags(set, set->nr_hw_queues, nr_hw_queues) <
0)
goto reregister;
prev_nr_hw_queues = set->nr_hw_queues;
set->nr_hw_queues = nr_hw_queues;
blk_mq_update_queue_map(set);
fallback:
blk_mq_update_queue_map(set);
list_for_each_entry(q, &set->tag_list, tag_set_list) {
blk_mq_realloc_hw_ctxs(set, q);
if (q->nr_hw_queues != set->nr_hw_queues) {
@ -3609,6 +3789,9 @@ static int __init blk_mq_init(void)
{
cpuhp_setup_state_multi(CPUHP_BLK_MQ_DEAD, "block/mq:dead", NULL,
blk_mq_hctx_notify_dead);
cpuhp_setup_state_multi(CPUHP_AP_BLK_MQ_ONLINE, "block/mq:online",
blk_mq_hctx_notify_online,
blk_mq_hctx_notify_offline);
return 0;
}
subsys_initcall(blk_mq_init);

4
block/blk-mq.h
View File

@ -201,7 +201,7 @@ static inline void __blk_mq_put_driver_tag(struct blk_mq_hw_ctx *hctx,
struct request *rq)
{
blk_mq_put_tag(hctx->tags, rq->mq_ctx, rq->tag);
rq->tag = -1;
rq->tag = BLK_MQ_NO_TAG;
if (rq->rq_flags & RQF_MQ_INFLIGHT) {
rq->rq_flags &= ~RQF_MQ_INFLIGHT;
@ -211,7 +211,7 @@ static inline void __blk_mq_put_driver_tag(struct blk_mq_hw_ctx *hctx,
static inline void blk_mq_put_driver_tag(struct request *rq)
{
if (rq->tag == -1 || rq->internal_tag == -1)
if (rq->tag == BLK_MQ_NO_TAG || rq->internal_tag == BLK_MQ_NO_TAG)
return;
__blk_mq_put_driver_tag(rq->mq_hctx, rq);

68
block/blk-settings.c
View File

@ -48,6 +48,7 @@ void blk_set_default_limits(struct queue_limits *lim)
lim->chunk_sectors = 0;
lim->max_write_same_sectors = 0;
lim->max_write_zeroes_sectors = 0;
lim->max_zone_append_sectors = 0;
lim->max_discard_sectors = 0;
lim->max_hw_discard_sectors = 0;
lim->discard_granularity = 0;
@ -83,6 +84,7 @@ void blk_set_stacking_limits(struct queue_limits *lim)
lim->max_dev_sectors = UINT_MAX;
lim->max_write_same_sectors = UINT_MAX;
lim->max_write_zeroes_sectors = UINT_MAX;
lim->max_zone_append_sectors = UINT_MAX;
}
EXPORT_SYMBOL(blk_set_stacking_limits);
@ -221,6 +223,33 @@ void blk_queue_max_write_zeroes_sectors(struct request_queue *q,
}
EXPORT_SYMBOL(blk_queue_max_write_zeroes_sectors);
/**
* blk_queue_max_zone_append_sectors - set max sectors for a single zone append
* @q: the request queue for the device
* @max_zone_append_sectors: maximum number of sectors to write per command
**/
void blk_queue_max_zone_append_sectors(struct request_queue *q,
unsigned int max_zone_append_sectors)
{
unsigned int max_sectors;
if (WARN_ON(!blk_queue_is_zoned(q)))
return;
max_sectors = min(q->limits.max_hw_sectors, max_zone_append_sectors);
max_sectors = min(q->limits.chunk_sectors, max_sectors);
/*
* Signal eventual driver bugs resulting in the max_zone_append sectors limit
* being 0 due to a 0 argument, the chunk_sectors limit (zone size) not set,
* or the max_hw_sectors limit not set.
*/
WARN_ON(!max_sectors);
q->limits.max_zone_append_sectors = max_sectors;
}
EXPORT_SYMBOL_GPL(blk_queue_max_zone_append_sectors);
/**
* blk_queue_max_segments - set max hw segments for a request for this queue
* @q: the request queue for the device
@ -470,6 +499,8 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b,
b->max_write_same_sectors);
t->max_write_zeroes_sectors = min(t->max_write_zeroes_sectors,
b->max_write_zeroes_sectors);
t->max_zone_append_sectors = min(t->max_zone_append_sectors,
b->max_zone_append_sectors);
t->bounce_pfn = min_not_zero(t->bounce_pfn, b->bounce_pfn);
t->seg_boundary_mask = min_not_zero(t->seg_boundary_mask,
@ -651,43 +682,6 @@ void blk_queue_update_dma_pad(struct request_queue *q, unsigned int mask)
}
EXPORT_SYMBOL(blk_queue_update_dma_pad);
/**
* blk_queue_dma_drain - Set up a drain buffer for excess dma.
* @q: the request queue for the device
* @dma_drain_needed: fn which returns non-zero if drain is necessary
* @buf: physically contiguous buffer
* @size: size of the buffer in bytes
*
* Some devices have excess DMA problems and can't simply discard (or
* zero fill) the unwanted piece of the transfer. They have to have a
* real area of memory to transfer it into. The use case for this is
* ATAPI devices in DMA mode. If the packet command causes a transfer
* bigger than the transfer size some HBAs will lock up if there
* aren't DMA elements to contain the excess transfer. What this API
* does is adjust the queue so that the buf is always appended
* silently to the scatterlist.
*
* Note: This routine adjusts max_hw_segments to make room for appending
* the drain buffer. If you call blk_queue_max_segments() after calling
* this routine, you must set the limit to one fewer than your device
* can support otherwise there won't be room for the drain buffer.
*/
int blk_queue_dma_drain(struct request_queue *q,
dma_drain_needed_fn *dma_drain_needed,
void *buf, unsigned int size)
{
if (queue_max_segments(q) < 2)
return -EINVAL;
/* make room for appending the drain */
blk_queue_max_segments(q, queue_max_segments(q) - 1);
q->dma_drain_needed = dma_drain_needed;
q->dma_drain_buffer = buf;
q->dma_drain_size = size;
return 0;
}
EXPORT_SYMBOL_GPL(blk_queue_dma_drain);
/**
* blk_queue_segment_boundary - set boundary rules for segment merging
* @q: the request queue for the device

13
block/blk-sysfs.c
View File

@ -218,6 +218,13 @@ static ssize_t queue_write_zeroes_max_show(struct request_queue *q, char *page)
(unsigned long long)q->limits.max_write_zeroes_sectors << 9);
}
static ssize_t queue_zone_append_max_show(struct request_queue *q, char *page)
{
unsigned long long max_sectors = q->limits.max_zone_append_sectors;
return sprintf(page, "%llu\n", max_sectors << SECTOR_SHIFT);
}
static ssize_t
queue_max_sectors_store(struct request_queue *q, const char *page, size_t count)
{
@ -639,6 +646,11 @@ static struct queue_sysfs_entry queue_write_zeroes_max_entry = {
.show = queue_write_zeroes_max_show,
};
static struct queue_sysfs_entry queue_zone_append_max_entry = {
.attr = {.name = "zone_append_max_bytes", .mode = 0444 },
.show = queue_zone_append_max_show,
};
static struct queue_sysfs_entry queue_nonrot_entry = {
.attr = {.name = "rotational", .mode = 0644 },
.show = queue_show_nonrot,
@ -749,6 +761,7 @@ static struct attribute *queue_attrs[] = {
&queue_discard_zeroes_data_entry.attr,
&queue_write_same_max_entry.attr,
&queue_write_zeroes_max_entry.attr,
&queue_zone_append_max_entry.attr,
&queue_nonrot_entry.attr,
&queue_zoned_entry.attr,
&queue_nr_zones_entry.attr,

63
block/blk-throttle.c
View File

@ -2358,69 +2358,6 @@ void blk_throtl_bio_endio(struct bio *bio)
}
#endif
/*
* Dispatch all bios from all children tg's queued on @parent_sq. On
* return, @parent_sq is guaranteed to not have any active children tg's
* and all bios from previously active tg's are on @parent_sq->bio_lists[].
*/
static void tg_drain_bios(struct throtl_service_queue *parent_sq)
{
struct throtl_grp *tg;
while ((tg = throtl_rb_first(parent_sq))) {
struct throtl_service_queue *sq = &tg->service_queue;
struct bio *bio;
throtl_dequeue_tg(tg);
while ((bio = throtl_peek_queued(&sq->queued[READ])))
tg_dispatch_one_bio(tg, bio_data_dir(bio));
while ((bio = throtl_peek_queued(&sq->queued[WRITE])))
tg_dispatch_one_bio(tg, bio_data_dir(bio));
}
}
/**
* blk_throtl_drain - drain throttled bios
* @q: request_queue to drain throttled bios for
*
* Dispatch all currently throttled bios on @q through ->make_request_fn().
*/
void blk_throtl_drain(struct request_queue *q)
__releases(&q->queue_lock) __acquires(&q->queue_lock)
{
struct throtl_data *td = q->td;
struct blkcg_gq *blkg;
struct cgroup_subsys_state *pos_css;
struct bio *bio;
int rw;
rcu_read_lock();
/*
* Drain each tg while doing post-order walk on the blkg tree, so
* that all bios are propagated to td->service_queue. It'd be
* better to walk service_queue tree directly but blkg walk is
* easier.
*/
blkg_for_each_descendant_post(blkg, pos_css, td->queue->root_blkg)
tg_drain_bios(&blkg_to_tg(blkg)->service_queue);
/* finally, transfer bios from top-level tg's into the td */
tg_drain_bios(&td->service_queue);
rcu_read_unlock();
spin_unlock_irq(&q->queue_lock);
/* all bios now should be in td->service_queue, issue them */
for (rw = READ; rw <= WRITE; rw++)
while ((bio = throtl_pop_queued(&td->service_queue.queued[rw],
NULL)))
generic_make_request(bio);
spin_lock_irq(&q->queue_lock);
}
int blk_throtl_init(struct request_queue *q)
{
struct throtl_data *td;

16
block/blk-wbt.c
View File

@ -405,7 +405,7 @@ static void wb_timer_fn(struct blk_stat_callback *cb)
rwb_arm_timer(rwb);
}
static void __wbt_update_limits(struct rq_wb *rwb)
static void wbt_update_limits(struct rq_wb *rwb)
{
struct rq_depth *rqd = &rwb->rq_depth;
@ -418,14 +418,6 @@ static void __wbt_update_limits(struct rq_wb *rwb)
rwb_wake_all(rwb);
}
void wbt_update_limits(struct request_queue *q)
{
struct rq_qos *rqos = wbt_rq_qos(q);
if (!rqos)
return;
__wbt_update_limits(RQWB(rqos));
}
u64 wbt_get_min_lat(struct request_queue *q)
{
struct rq_qos *rqos = wbt_rq_qos(q);
@ -441,7 +433,7 @@ void wbt_set_min_lat(struct request_queue *q, u64 val)
return;
RQWB(rqos)->min_lat_nsec = val;
RQWB(rqos)->enable_state = WBT_STATE_ON_MANUAL;
__wbt_update_limits(RQWB(rqos));
wbt_update_limits(RQWB(rqos));
}
@ -685,7 +677,7 @@ static int wbt_data_dir(const struct request *rq)
static void wbt_queue_depth_changed(struct rq_qos *rqos)
{
RQWB(rqos)->rq_depth.queue_depth = blk_queue_depth(rqos->q);
__wbt_update_limits(RQWB(rqos));
wbt_update_limits(RQWB(rqos));
}
static void wbt_exit(struct rq_qos *rqos)
@ -843,7 +835,7 @@ int wbt_init(struct request_queue *q)
rwb->enable_state = WBT_STATE_ON_DEFAULT;
rwb->wc = 1;
rwb->rq_depth.default_depth = RWB_DEF_DEPTH;
__wbt_update_limits(rwb);
wbt_update_limits(rwb);
/*
* Assign rwb and add the stats callback.

4
block/blk-wbt.h
View File

@ -88,7 +88,6 @@ static inline unsigned int wbt_inflight(struct rq_wb *rwb)
#ifdef CONFIG_BLK_WBT
int wbt_init(struct request_queue *);
void wbt_update_limits(struct request_queue *);
void wbt_disable_default(struct request_queue *);
void wbt_enable_default(struct request_queue *);
@ -108,9 +107,6 @@ static inline int wbt_init(struct request_queue *q)
{
return -EINVAL;
}
static inline void wbt_update_limits(struct request_queue *q)
{
}
static inline void wbt_disable_default(struct request_queue *q)
{
}

23
block/blk-zoned.c
View File

@ -82,6 +82,20 @@ bool blk_req_needs_zone_write_lock(struct request *rq)
}
EXPORT_SYMBOL_GPL(blk_req_needs_zone_write_lock);
bool blk_req_zone_write_trylock(struct request *rq)
{
unsigned int zno = blk_rq_zone_no(rq);
if (test_and_set_bit(zno, rq->q->seq_zones_wlock))
return false;
WARN_ON_ONCE(rq->rq_flags & RQF_ZONE_WRITE_LOCKED);
rq->rq_flags |= RQF_ZONE_WRITE_LOCKED;
return true;
}
EXPORT_SYMBOL_GPL(blk_req_zone_write_trylock);
void __blk_req_zone_write_lock(struct request *rq)
{
if (WARN_ON_ONCE(test_and_set_bit(blk_rq_zone_no(rq),
@ -457,14 +471,19 @@ static int blk_revalidate_zone_cb(struct blk_zone *zone, unsigned int idx,
/**
* blk_revalidate_disk_zones - (re)allocate and initialize zone bitmaps
* @disk: Target disk
* @update_driver_data: Callback to update driver data on the frozen disk
*
* Helper function for low-level device drivers to (re) allocate and initialize
* a disk request queue zone bitmaps. This functions should normally be called
* within the disk ->revalidate method for blk-mq based drivers. For BIO based
* drivers only q->nr_zones needs to be updated so that the sysfs exposed value
* is correct.
* If the @update_driver_data callback function is not NULL, the callback is
* executed with the device request queue frozen after all zones have been
* checked.
*/
int blk_revalidate_disk_zones(struct gendisk *disk)
int blk_revalidate_disk_zones(struct gendisk *disk,
void (*update_driver_data)(struct gendisk *disk))
{
struct request_queue *q = disk->queue;
struct blk_revalidate_zone_args args = {
@ -498,6 +517,8 @@ int blk_revalidate_disk_zones(struct gendisk *disk)
q->nr_zones = args.nr_zones;
swap(q->seq_zones_wlock, args.seq_zones_wlock);
swap(q->conv_zones_bitmap, args.conv_zones_bitmap);
if (update_driver_data)
update_driver_data(disk);
ret = 0;
} else {
pr_warn("%s: failed to revalidate zones\n", disk->disk_name);

88
block/blk.h
View File

@ -5,7 +5,9 @@
#include <linux/idr.h>
#include <linux/blk-mq.h>
#include <linux/part_stat.h>
#include <linux/blk-crypto.h>
#include <xen/xen.h>
#include "blk-crypto-internal.h"
#include "blk-mq.h"
#include "blk-mq-sched.h"
@ -17,7 +19,6 @@ extern struct dentry *blk_debugfs_root;
#endif
struct blk_flush_queue {
unsigned int flush_queue_delayed:1;
unsigned int flush_pending_idx:1;
unsigned int flush_running_idx:1;
blk_status_t rq_status;
@ -62,17 +63,6 @@ void blk_free_flush_queue(struct blk_flush_queue *q);
void blk_freeze_queue(struct request_queue *q);
static inline void blk_queue_enter_live(struct request_queue *q)
{
/*
* Given that running in generic_make_request() context
* guarantees that a live reference against q_usage_counter has
* been established, further references under that same context
* need not check that the queue has been frozen (marked dead).
*/
percpu_ref_get(&q->q_usage_counter);
}
static inline bool biovec_phys_mergeable(struct request_queue *q,
struct bio_vec *vec1, struct bio_vec *vec2)
{
@ -195,8 +185,7 @@ bool bio_attempt_discard_merge(struct request_queue *q, struct request *req,
bool blk_attempt_plug_merge(struct request_queue *q, struct bio *bio,
unsigned int nr_segs, struct request **same_queue_rq);
void blk_account_io_start(struct request *req, bool new_io);
void blk_account_io_completion(struct request *req, unsigned int bytes);
void blk_account_io_start(struct request *req);
void blk_account_io_done(struct request *req, u64 now);
/*
@ -303,36 +292,14 @@ void ioc_clear_queue(struct request_queue *q);
int create_task_io_context(struct task_struct *task, gfp_t gfp_mask, int node);
/**
* create_io_context - try to create task->io_context
* @gfp_mask: allocation mask
* @node: allocation node
*
* If %current->io_context is %NULL, allocate a new io_context and install
* it. Returns the current %current->io_context which may be %NULL if
* allocation failed.
*
* Note that this function can't be called with IRQ disabled because
* task_lock which protects %current->io_context is IRQ-unsafe.
*/
static inline struct io_context *create_io_context(gfp_t gfp_mask, int node)
{
WARN_ON_ONCE(irqs_disabled());
if (unlikely(!current->io_context))
create_task_io_context(current, gfp_mask, node);
return current->io_context;
}
/*
* Internal throttling interface
*/
#ifdef CONFIG_BLK_DEV_THROTTLING
extern void blk_throtl_drain(struct request_queue *q);
extern int blk_throtl_init(struct request_queue *q);
extern void blk_throtl_exit(struct request_queue *q);
extern void blk_throtl_register_queue(struct request_queue *q);
#else /* CONFIG_BLK_DEV_THROTTLING */
static inline void blk_throtl_drain(struct request_queue *q) { }
static inline int blk_throtl_init(struct request_queue *q) { return 0; }
static inline void blk_throtl_exit(struct request_queue *q) { }
static inline void blk_throtl_register_queue(struct request_queue *q) { }
@ -375,11 +342,6 @@ void blk_queue_free_zone_bitmaps(struct request_queue *q);
static inline void blk_queue_free_zone_bitmaps(struct request_queue *q) {}
#endif
void part_dec_in_flight(struct request_queue *q, struct hd_struct *part,
int rw);
void part_inc_in_flight(struct request_queue *q, struct hd_struct *part,
int rw);
void update_io_ticks(struct hd_struct *part, unsigned long now, bool end);
struct hd_struct *disk_map_sector_rcu(struct gendisk *disk, sector_t sector);
int blk_alloc_devt(struct hd_struct *part, dev_t *devt);
@ -389,44 +351,32 @@ char *disk_name(struct gendisk *hd, int partno, char *buf);
#define ADDPART_FLAG_NONE 0
#define ADDPART_FLAG_RAID 1
#define ADDPART_FLAG_WHOLEDISK 2
struct hd_struct *__must_check add_partition(struct gendisk *disk, int partno,
sector_t start, sector_t len, int flags,
struct partition_meta_info *info);
void __delete_partition(struct percpu_ref *ref);
void delete_partition(struct gendisk *disk, int partno);
void delete_partition(struct gendisk *disk, struct hd_struct *part);
int bdev_add_partition(struct block_device *bdev, int partno,
sector_t start, sector_t length);
int bdev_del_partition(struct block_device *bdev, int partno);
int bdev_resize_partition(struct block_device *bdev, int partno,
sector_t start, sector_t length);
int disk_expand_part_tbl(struct gendisk *disk, int target);
int hd_ref_init(struct hd_struct *part);
static inline int hd_ref_init(struct hd_struct *part)
{
if (percpu_ref_init(&part->ref, __delete_partition, 0,
GFP_KERNEL))
return -ENOMEM;
return 0;
}
static inline void hd_struct_get(struct hd_struct *part)
{
percpu_ref_get(&part->ref);
}
/* no need to get/put refcount of part0 */
static inline int hd_struct_try_get(struct hd_struct *part)
{
return percpu_ref_tryget_live(&part->ref);
if (part->partno)
return percpu_ref_tryget_live(&part->ref);
return 1;
}
static inline void hd_struct_put(struct hd_struct *part)
{
percpu_ref_put(&part->ref);
}
static inline void hd_struct_kill(struct hd_struct *part)
{
percpu_ref_kill(&part->ref);
if (part->partno)
percpu_ref_put(&part->ref);
}
static inline void hd_free_part(struct hd_struct *part)
{
free_part_stats(part);
free_percpu(part->dkstats);
kfree(part->info);
percpu_ref_exit(&part->ref);
}
@ -484,8 +434,8 @@ static inline void part_nr_sects_write(struct hd_struct *part, sector_t size)
struct request_queue *__blk_alloc_queue(int node_id);
int __bio_add_pc_page(struct request_queue *q, struct bio *bio,
int bio_add_hw_page(struct request_queue *q, struct bio *bio,
struct page *page, unsigned int len, unsigned int offset,
bool *same_page);
unsigned int max_sectors, bool *same_page);
#endif /* BLK_INTERNAL_H */

2
block/bounce.c
View File

@ -267,6 +267,8 @@ static struct bio *bounce_clone_bio(struct bio *bio_src, gfp_t gfp_mask,
break;
}
bio_crypt_clone(bio, bio_src, gfp_mask);
if (bio_integrity(bio_src)) {
int ret;

133
block/genhd.c
View File

@ -92,7 +92,6 @@ const char *bdevname(struct block_device *bdev, char *buf)
}
EXPORT_SYMBOL(bdevname);
#ifdef CONFIG_SMP
static void part_stat_read_all(struct hd_struct *part, struct disk_stats *stat)
{
int cpu;
@ -112,44 +111,13 @@ static void part_stat_read_all(struct hd_struct *part, struct disk_stats *stat)
stat->io_ticks += ptr->io_ticks;
}
}
#else /* CONFIG_SMP */
static void part_stat_read_all(struct hd_struct *part, struct disk_stats *stat)
{
memcpy(stat, &part->dkstats, sizeof(struct disk_stats));
}
#endif /* CONFIG_SMP */
void part_inc_in_flight(struct request_queue *q, struct hd_struct *part, int rw)
{
if (queue_is_mq(q))
return;
part_stat_local_inc(part, in_flight[rw]);
if (part->partno)
part_stat_local_inc(&part_to_disk(part)->part0, in_flight[rw]);
}
void part_dec_in_flight(struct request_queue *q, struct hd_struct *part, int rw)
{
if (queue_is_mq(q))
return;
part_stat_local_dec(part, in_flight[rw]);
if (part->partno)
part_stat_local_dec(&part_to_disk(part)->part0, in_flight[rw]);
}
static unsigned int part_in_flight(struct request_queue *q,
struct hd_struct *part)
{
unsigned int inflight = 0;
int cpu;
unsigned int inflight;
if (queue_is_mq(q)) {
return blk_mq_in_flight(q, part);
}
inflight = 0;
for_each_possible_cpu(cpu) {
inflight += part_stat_local_read_cpu(part, in_flight[0], cpu) +
part_stat_local_read_cpu(part, in_flight[1], cpu);
@ -165,11 +133,6 @@ static void part_in_flight_rw(struct request_queue *q, struct hd_struct *part,
{
int cpu;
if (queue_is_mq(q)) {
blk_mq_in_flight_rw(q, part, inflight);
return;
}
inflight[0] = 0;
inflight[1] = 0;
for_each_possible_cpu(cpu) {
@ -344,11 +307,13 @@ static inline int sector_in_part(struct hd_struct *part, sector_t sector)
* primarily used for stats accounting.
*
* CONTEXT:
* RCU read locked. The returned partition pointer is valid only
* while preemption is disabled.
* RCU read locked. The returned partition pointer is always valid
* because its refcount is grabbed except for part0, which lifetime
* is same with the disk.
*
* RETURNS:
* Found partition on success, part0 is returned if no partition matches
* or the matched partition is being deleted.
*/
struct hd_struct *disk_map_sector_rcu(struct gendisk *disk, sector_t sector)
{
@ -356,21 +321,33 @@ struct hd_struct *disk_map_sector_rcu(struct gendisk *disk, sector_t sector)
struct hd_struct *part;
int i;
rcu_read_lock();
ptbl = rcu_dereference(disk->part_tbl);
part = rcu_dereference(ptbl->last_lookup);
if (part && sector_in_part(part, sector))
return part;
if (part && sector_in_part(part, sector) && hd_struct_try_get(part))
goto out_unlock;
for (i = 1; i < ptbl->len; i++) {
part = rcu_dereference(ptbl->part[i]);
if (part && sector_in_part(part, sector)) {
/*
* only live partition can be cached for lookup,
* so use-after-free on cached & deleting partition
* can be avoided
*/
if (!hd_struct_try_get(part))
break;
rcu_assign_pointer(ptbl->last_lookup, part);
return part;
goto out_unlock;
}
}
return &disk->part0;
part = &disk->part0;
out_unlock:
rcu_read_unlock();
return part;
}
/**
@ -840,13 +817,15 @@ static void __device_add_disk(struct device *parent, struct gendisk *disk,
disk->flags |= GENHD_FL_SUPPRESS_PARTITION_INFO;
disk->flags |= GENHD_FL_NO_PART_SCAN;
} else {
struct backing_dev_info *bdi = disk->queue->backing_dev_info;
struct device *dev = disk_to_dev(disk);
int ret;
/* Register BDI before referencing it from bdev */
disk_to_dev(disk)->devt = devt;
ret = bdi_register_owner(disk->queue->backing_dev_info,
disk_to_dev(disk));
dev->devt = devt;
ret = bdi_register(bdi, "%u:%u", MAJOR(devt), MINOR(devt));
WARN_ON(ret);
bdi_set_owner(bdi, dev);
blk_register_region(disk_devt(disk), disk->minors, NULL,
exact_match, exact_lock, disk);
}
@ -878,6 +857,25 @@ void device_add_disk_no_queue_reg(struct device *parent, struct gendisk *disk)
}
EXPORT_SYMBOL(device_add_disk_no_queue_reg);
static void invalidate_partition(struct gendisk *disk, int partno)
{
struct block_device *bdev;
bdev = bdget_disk(disk, partno);
if (!bdev)
return;
fsync_bdev(bdev);
__invalidate_device(bdev, true);
/*
* Unhash the bdev inode for this device so that it gets evicted as soon
* as last inode reference is dropped.
*/
remove_inode_hash(bdev->bd_inode);
bdput(bdev);
}
void del_gendisk(struct gendisk *disk)
{
struct disk_part_iter piter;
@ -896,13 +894,11 @@ void del_gendisk(struct gendisk *disk)
DISK_PITER_INCL_EMPTY | DISK_PITER_REVERSE);
while ((part = disk_part_iter_next(&piter))) {
invalidate_partition(disk, part->partno);
bdev_unhash_inode(part_devt(part));
delete_partition(disk, part->partno);
delete_partition(disk, part);
}
disk_part_iter_exit(&piter);
invalidate_partition(disk, 0);
bdev_unhash_inode(disk_devt(disk));
set_capacity(disk, 0);
disk->flags &= ~GENHD_FL_UP;
up_write(&disk->lookup_sem);
@ -1279,7 +1275,10 @@ ssize_t part_stat_show(struct device *dev,
unsigned int inflight;
part_stat_read_all(p, &stat);
inflight = part_in_flight(q, p);
if (queue_is_mq(q))
inflight = blk_mq_in_flight(q, p);
else
inflight = part_in_flight(q, p);
return sprintf(buf,
"%8lu %8lu %8llu %8u "
@ -1318,7 +1317,11 @@ ssize_t part_inflight_show(struct device *dev, struct device_attribute *attr,
struct request_queue *q = part_to_disk(p)->queue;
unsigned int inflight[2];
part_in_flight_rw(q, p, inflight);
if (queue_is_mq(q))
blk_mq_in_flight_rw(q, p, inflight);
else
part_in_flight_rw(q, p, inflight);
return sprintf(buf, "%8u %8u\n", inflight[0], inflight[1]);
}
@ -1573,7 +1576,10 @@ static int diskstats_show(struct seq_file *seqf, void *v)
disk_part_iter_init(&piter, gp, DISK_PITER_INCL_EMPTY_PART0);
while ((hd = disk_part_iter_next(&piter))) {
part_stat_read_all(hd, &stat);
inflight = part_in_flight(gp->queue, hd);
if (queue_is_mq(gp->queue))
inflight = blk_mq_in_flight(gp->queue, hd);
else
inflight = part_in_flight(gp->queue, hd);
seq_printf(seqf, "%4d %7d %s "
"%lu %lu %lu %u "
@ -1680,14 +1686,15 @@ struct gendisk *__alloc_disk_node(int minors, int node_id)
disk = kzalloc_node(sizeof(struct gendisk), GFP_KERNEL, node_id);
if (disk) {
if (!init_part_stats(&disk->part0)) {
disk->part0.dkstats = alloc_percpu(struct disk_stats);
if (!disk->part0.dkstats) {
kfree(disk);
return NULL;
}
init_rwsem(&disk->lookup_sem);
disk->node_id = node_id;
if (disk_expand_part_tbl(disk, 0)) {
free_part_stats(&disk->part0);
free_percpu(disk->part0.dkstats);
kfree(disk);
return NULL;
}
@ -1703,7 +1710,7 @@ struct gendisk *__alloc_disk_node(int minors, int node_id)
* TODO: Ideally set_capacity() and get_capacity() should be
* converted to make use of bd_mutex and sequence counters.
*/
seqcount_init(&disk->part0.nr_sects_seq);
hd_sects_seq_init(&disk->part0);
if (hd_ref_init(&disk->part0)) {
hd_free_part(&disk->part0);
kfree(disk);
@ -1806,20 +1813,6 @@ int bdev_read_only(struct block_device *bdev)
EXPORT_SYMBOL(bdev_read_only);
int invalidate_partition(struct gendisk *disk, int partno)
{
int res = 0;
struct block_device *bdev = bdget_disk(disk, partno);
if (bdev) {
fsync_bdev(bdev);
res = __invalidate_device(bdev, true);
bdput(bdev);
}
return res;
}
EXPORT_SYMBOL(invalidate_partition);
/*
* Disk events - monitor disk events like media change and eject request.
*/

148
block/ioctl.c
View File

@ -16,143 +16,45 @@
static int blkpg_do_ioctl(struct block_device *bdev,
struct blkpg_partition __user *upart, int op)
{
struct block_device *bdevp;
struct gendisk *disk;
struct hd_struct *part, *lpart;
struct blkpg_partition p;
struct disk_part_iter piter;
long long start, length;
int partno;
if (!capable(CAP_SYS_ADMIN))
return -EACCES;
if (copy_from_user(&p, upart, sizeof(struct blkpg_partition)))
return -EFAULT;
disk = bdev->bd_disk;
if (bdev != bdev->bd_contains)
return -EINVAL;
partno = p.pno;
if (partno <= 0)
if (p.pno <= 0)
return -EINVAL;
switch (op) {
case BLKPG_ADD_PARTITION:
start = p.start >> 9;
length = p.length >> 9;
/* check for fit in a hd_struct */
if (sizeof(sector_t) == sizeof(long) &&
sizeof(long long) > sizeof(long)) {
long pstart = start, plength = length;
if (pstart != start || plength != length
|| pstart < 0 || plength < 0 || partno > 65535)
return -EINVAL;
}
/* check if partition is aligned to blocksize */
if (p.start & (bdev_logical_block_size(bdev) - 1))
return -EINVAL;
mutex_lock(&bdev->bd_mutex);
if (op == BLKPG_DEL_PARTITION)
return bdev_del_partition(bdev, p.pno);
/* overlap? */
disk_part_iter_init(&piter, disk,
DISK_PITER_INCL_EMPTY);
while ((part = disk_part_iter_next(&piter))) {
if (!(start + length <= part->start_sect ||
start >= part->start_sect + part->nr_sects)) {
disk_part_iter_exit(&piter);
mutex_unlock(&bdev->bd_mutex);
return -EBUSY;
}
}
disk_part_iter_exit(&piter);
start = p.start >> SECTOR_SHIFT;
length = p.length >> SECTOR_SHIFT;
/* all seems OK */
part = add_partition(disk, partno, start, length,
ADDPART_FLAG_NONE, NULL);
mutex_unlock(&bdev->bd_mutex);
return PTR_ERR_OR_ZERO(part);
case BLKPG_DEL_PARTITION:
part = disk_get_part(disk, partno);
if (!part)
return -ENXIO;
/* check for fit in a hd_struct */
if (sizeof(sector_t) < sizeof(long long)) {
long pstart = start, plength = length;
bdevp = bdget(part_devt(part));
disk_put_part(part);
if (!bdevp)
return -ENOMEM;
mutex_lock(&bdevp->bd_mutex);
if (bdevp->bd_openers) {
mutex_unlock(&bdevp->bd_mutex);
bdput(bdevp);
return -EBUSY;
}
/* all seems OK */
fsync_bdev(bdevp);
invalidate_bdev(bdevp);
mutex_lock_nested(&bdev->bd_mutex, 1);
delete_partition(disk, partno);
mutex_unlock(&bdev->bd_mutex);
mutex_unlock(&bdevp->bd_mutex);
bdput(bdevp);
return 0;
case BLKPG_RESIZE_PARTITION:
start = p.start >> 9;
/* new length of partition in bytes */
length = p.length >> 9;
/* check for fit in a hd_struct */
if (sizeof(sector_t) == sizeof(long) &&
sizeof(long long) > sizeof(long)) {
long pstart = start, plength = length;
if (pstart != start || plength != length
|| pstart < 0 || plength < 0)
return -EINVAL;
}
part = disk_get_part(disk, partno);
if (!part)
return -ENXIO;
bdevp = bdget(part_devt(part));
if (!bdevp) {
disk_put_part(part);
return -ENOMEM;
}
mutex_lock(&bdevp->bd_mutex);
mutex_lock_nested(&bdev->bd_mutex, 1);
if (start != part->start_sect) {
mutex_unlock(&bdevp->bd_mutex);
mutex_unlock(&bdev->bd_mutex);
bdput(bdevp);
disk_put_part(part);
return -EINVAL;
}
/* overlap? */
disk_part_iter_init(&piter, disk,
DISK_PITER_INCL_EMPTY);
while ((lpart = disk_part_iter_next(&piter))) {
if (lpart->partno != partno &&
!(start + length <= lpart->start_sect ||
start >= lpart->start_sect + lpart->nr_sects)
) {
disk_part_iter_exit(&piter);
mutex_unlock(&bdevp->bd_mutex);
mutex_unlock(&bdev->bd_mutex);
bdput(bdevp);
disk_put_part(part);
return -EBUSY;
}
}
disk_part_iter_exit(&piter);
part_nr_sects_write(part, (sector_t)length);
i_size_write(bdevp->bd_inode, p.length);
mutex_unlock(&bdevp->bd_mutex);
mutex_unlock(&bdev->bd_mutex);
bdput(bdevp);
disk_put_part(part);
return 0;
default:
if (pstart != start || plength != length || pstart < 0 ||
plength < 0 || p.pno > 65535)
return -EINVAL;
}
switch (op) {
case BLKPG_ADD_PARTITION:
/* check if partition is aligned to blocksize */
if (p.start & (bdev_logical_block_size(bdev) - 1))
return -EINVAL;
return bdev_add_partition(bdev, p.pno, start, length);
case BLKPG_RESIZE_PARTITION:
return bdev_resize_partition(bdev, p.pno, start, length);
default:
return -EINVAL;
}
}
static int blkpg_ioctl(struct block_device *bdev,
@ -302,12 +204,12 @@ static int put_u64(u64 __user *argp, u64 val)
}
#ifdef CONFIG_COMPAT
static int compat_put_long(compat_long_t *argp, long val)
static int compat_put_long(compat_long_t __user *argp, long val)
{
return put_user(val, argp);
}
static int compat_put_ulong(compat_ulong_t *argp, compat_ulong_t val)
static int compat_put_ulong(compat_ulong_t __user *argp, compat_ulong_t val)
{
return put_user(val, argp);
}

397
block/keyslot-manager.c Normal file
View File

@ -0,0 +1,397 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright 2019 Google LLC
*/
/**
* DOC: The Keyslot Manager
*
* Many devices with inline encryption support have a limited number of "slots"
* into which encryption contexts may be programmed, and requests can be tagged
* with a slot number to specify the key to use for en/decryption.
*
* As the number of slots is limited, and programming keys is expensive on
* many inline encryption hardware, we don't want to program the same key into
* multiple slots - if multiple requests are using the same key, we want to
* program just one slot with that key and use that slot for all requests.
*
* The keyslot manager manages these keyslots appropriately, and also acts as
* an abstraction between the inline encryption hardware and the upper layers.
*
* Lower layer devices will set up a keyslot manager in their request queue
* and tell it how to perform device specific operations like programming/
* evicting keys from keyslots.
*
* Upper layers will call blk_ksm_get_slot_for_key() to program a
* key into some slot in the inline encryption hardware.
*/
#define pr_fmt(fmt) "blk-crypto: " fmt
#include <linux/keyslot-manager.h>
#include <linux/atomic.h>
#include <linux/mutex.h>
#include <linux/pm_runtime.h>
#include <linux/wait.h>
#include <linux/blkdev.h>
struct blk_ksm_keyslot {
atomic_t slot_refs;
struct list_head idle_slot_node;
struct hlist_node hash_node;
const struct blk_crypto_key *key;
struct blk_keyslot_manager *ksm;
};
static inline void blk_ksm_hw_enter(struct blk_keyslot_manager *ksm)
{
/*
* Calling into the driver requires ksm->lock held and the device
* resumed. But we must resume the device first, since that can acquire
* and release ksm->lock via blk_ksm_reprogram_all_keys().
*/
if (ksm->dev)
pm_runtime_get_sync(ksm->dev);
down_write(&ksm->lock);
}
static inline void blk_ksm_hw_exit(struct blk_keyslot_manager *ksm)
{
up_write(&ksm->lock);
if (ksm->dev)
pm_runtime_put_sync(ksm->dev);
}
/**
* blk_ksm_init() - Initialize a keyslot manager
* @ksm: The keyslot_manager to initialize.
* @num_slots: The number of key slots to manage.
*
* Allocate memory for keyslots and initialize a keyslot manager. Called by
* e.g. storage drivers to set up a keyslot manager in their request_queue.
*
* Return: 0 on success, or else a negative error code.
*/
int blk_ksm_init(struct blk_keyslot_manager *ksm, unsigned int num_slots)
{
unsigned int slot;
unsigned int i;
unsigned int slot_hashtable_size;
memset(ksm, 0, sizeof(*ksm));
if (num_slots == 0)
return -EINVAL;
ksm->slots = kvcalloc(num_slots, sizeof(ksm->slots[0]), GFP_KERNEL);
if (!ksm->slots)
return -ENOMEM;
ksm->num_slots = num_slots;
init_rwsem(&ksm->lock);
init_waitqueue_head(&ksm->idle_slots_wait_queue);
INIT_LIST_HEAD(&ksm->idle_slots);
for (slot = 0; slot < num_slots; slot++) {
ksm->slots[slot].ksm = ksm;
list_add_tail(&ksm->slots[slot].idle_slot_node,
&ksm->idle_slots);
}
spin_lock_init(&ksm->idle_slots_lock);
slot_hashtable_size = roundup_pow_of_two(num_slots);
ksm->log_slot_ht_size = ilog2(slot_hashtable_size);
ksm->slot_hashtable = kvmalloc_array(slot_hashtable_size,
sizeof(ksm->slot_hashtable[0]),
GFP_KERNEL);
if (!ksm->slot_hashtable)
goto err_destroy_ksm;
for (i = 0; i < slot_hashtable_size; i++)
INIT_HLIST_HEAD(&ksm->slot_hashtable[i]);
return 0;
err_destroy_ksm:
blk_ksm_destroy(ksm);
return -ENOMEM;
}
EXPORT_SYMBOL_GPL(blk_ksm_init);
static inline struct hlist_head *
blk_ksm_hash_bucket_for_key(struct blk_keyslot_manager *ksm,
const struct blk_crypto_key *key)
{
return &ksm->slot_hashtable[hash_ptr(key, ksm->log_slot_ht_size)];
}
static void blk_ksm_remove_slot_from_lru_list(struct blk_ksm_keyslot *slot)
{
struct blk_keyslot_manager *ksm = slot->ksm;
unsigned long flags;
spin_lock_irqsave(&ksm->idle_slots_lock, flags);
list_del(&slot->idle_slot_node);
spin_unlock_irqrestore(&ksm->idle_slots_lock, flags);
}
static struct blk_ksm_keyslot *blk_ksm_find_keyslot(
struct blk_keyslot_manager *ksm,
const struct blk_crypto_key *key)
{
const struct hlist_head *head = blk_ksm_hash_bucket_for_key(ksm, key);
struct blk_ksm_keyslot *slotp;
hlist_for_each_entry(slotp, head, hash_node) {
if (slotp->key == key)
return slotp;
}
return NULL;
}
static struct blk_ksm_keyslot *blk_ksm_find_and_grab_keyslot(
struct blk_keyslot_manager *ksm,
const struct blk_crypto_key *key)
{
struct blk_ksm_keyslot *slot;
slot = blk_ksm_find_keyslot(ksm, key);
if (!slot)
return NULL;
if (atomic_inc_return(&slot->slot_refs) == 1) {
/* Took first reference to this slot; remove it from LRU list */
blk_ksm_remove_slot_from_lru_list(slot);
}
return slot;
}
unsigned int blk_ksm_get_slot_idx(struct blk_ksm_keyslot *slot)
{
return slot - slot->ksm->slots;
}
EXPORT_SYMBOL_GPL(blk_ksm_get_slot_idx);
/**
* blk_ksm_get_slot_for_key() - Program a key into a keyslot.
* @ksm: The keyslot manager to program the key into.
* @key: Pointer to the key object to program, including the raw key, crypto
* mode, and data unit size.
* @slot_ptr: A pointer to return the pointer of the allocated keyslot.
*
* Get a keyslot that's been programmed with the specified key. If one already
* exists, return it with incremented refcount. Otherwise, wait for a keyslot
* to become idle and program it.
*
* Context: Process context. Takes and releases ksm->lock.
* Return: BLK_STS_OK on success (and keyslot is set to the pointer of the
* allocated keyslot), or some other blk_status_t otherwise (and
* keyslot is set to NULL).
*/
blk_status_t blk_ksm_get_slot_for_key(struct blk_keyslot_manager *ksm,
const struct blk_crypto_key *key,
struct blk_ksm_keyslot **slot_ptr)
{
struct blk_ksm_keyslot *slot;
int slot_idx;
int err;
*slot_ptr = NULL;
down_read(&ksm->lock);
slot = blk_ksm_find_and_grab_keyslot(ksm, key);
up_read(&ksm->lock);
if (slot)
goto success;
for (;;) {
blk_ksm_hw_enter(ksm);
slot = blk_ksm_find_and_grab_keyslot(ksm, key);
if (slot) {
blk_ksm_hw_exit(ksm);
goto success;
}
/*
* If we're here, that means there wasn't a slot that was
* already programmed with the key. So try to program it.
*/
if (!list_empty(&ksm->idle_slots))
break;
blk_ksm_hw_exit(ksm);
wait_event(ksm->idle_slots_wait_queue,
!list_empty(&ksm->idle_slots));
}
slot = list_first_entry(&ksm->idle_slots, struct blk_ksm_keyslot,
idle_slot_node);
slot_idx = blk_ksm_get_slot_idx(slot);
err = ksm->ksm_ll_ops.keyslot_program(ksm, key, slot_idx);
if (err) {
wake_up(&ksm->idle_slots_wait_queue);
blk_ksm_hw_exit(ksm);
return errno_to_blk_status(err);
}
/* Move this slot to the hash list for the new key. */
if (slot->key)
hlist_del(&slot->hash_node);
slot->key = key;
hlist_add_head(&slot->hash_node, blk_ksm_hash_bucket_for_key(ksm, key));
atomic_set(&slot->slot_refs, 1);
blk_ksm_remove_slot_from_lru_list(slot);
blk_ksm_hw_exit(ksm);
success:
*slot_ptr = slot;
return BLK_STS_OK;
}
/**
* blk_ksm_put_slot() - Release a reference to a slot
* @slot: The keyslot to release the reference of.
*
* Context: Any context.
*/
void blk_ksm_put_slot(struct blk_ksm_keyslot *slot)
{
struct blk_keyslot_manager *ksm;
unsigned long flags;
if (!slot)
return;
ksm = slot->ksm;
if (atomic_dec_and_lock_irqsave(&slot->slot_refs,
&ksm->idle_slots_lock, flags)) {
list_add_tail(&slot->idle_slot_node, &ksm->idle_slots);
spin_unlock_irqrestore(&ksm->idle_slots_lock, flags);
wake_up(&ksm->idle_slots_wait_queue);
}
}
/**
* blk_ksm_crypto_cfg_supported() - Find out if a crypto configuration is
* supported by a ksm.
* @ksm: The keyslot manager to check
* @cfg: The crypto configuration to check for.
*
* Checks for crypto_mode/data unit size/dun bytes support.
*
* Return: Whether or not this ksm supports the specified crypto config.
*/
bool blk_ksm_crypto_cfg_supported(struct blk_keyslot_manager *ksm,
const struct blk_crypto_config *cfg)
{
if (!ksm)
return false;
if (!(ksm->crypto_modes_supported[cfg->crypto_mode] &
cfg->data_unit_size))
return false;
if (ksm->max_dun_bytes_supported < cfg->dun_bytes)
return false;
return true;
}
/**
* blk_ksm_evict_key() - Evict a key from the lower layer device.
* @ksm: The keyslot manager to evict from
* @key: The key to evict
*
* Find the keyslot that the specified key was programmed into, and evict that
* slot from the lower layer device. The slot must not be in use by any
* in-flight IO when this function is called.
*
* Context: Process context. Takes and releases ksm->lock.
* Return: 0 on success or if there's no keyslot with the specified key, -EBUSY
* if the keyslot is still in use, or another -errno value on other
* error.
*/
int blk_ksm_evict_key(struct blk_keyslot_manager *ksm,
const struct blk_crypto_key *key)
{
struct blk_ksm_keyslot *slot;
int err = 0;
blk_ksm_hw_enter(ksm);
slot = blk_ksm_find_keyslot(ksm, key);
if (!slot)
goto out_unlock;
if (WARN_ON_ONCE(atomic_read(&slot->slot_refs) != 0)) {
err = -EBUSY;
goto out_unlock;
}
err = ksm->ksm_ll_ops.keyslot_evict(ksm, key,
blk_ksm_get_slot_idx(slot));
if (err)
goto out_unlock;
hlist_del(&slot->hash_node);
slot->key = NULL;
err = 0;
out_unlock:
blk_ksm_hw_exit(ksm);
return err;
}
/**
* blk_ksm_reprogram_all_keys() - Re-program all keyslots.
* @ksm: The keyslot manager
*
* Re-program all keyslots that are supposed to have a key programmed. This is
* intended only for use by drivers for hardware that loses its keys on reset.
*
* Context: Process context. Takes and releases ksm->lock.
*/
void blk_ksm_reprogram_all_keys(struct blk_keyslot_manager *ksm)
{
unsigned int slot;
/* This is for device initialization, so don't resume the device */
down_write(&ksm->lock);
for (slot = 0; slot < ksm->num_slots; slot++) {
const struct blk_crypto_key *key = ksm->slots[slot].key;
int err;
if (!key)
continue;
err = ksm->ksm_ll_ops.keyslot_program(ksm, key, slot);
WARN_ON(err);
}
up_write(&ksm->lock);
}
EXPORT_SYMBOL_GPL(blk_ksm_reprogram_all_keys);
void blk_ksm_destroy(struct blk_keyslot_manager *ksm)
{
if (!ksm)
return;
kvfree(ksm->slot_hashtable);
memzero_explicit(ksm->slots, sizeof(ksm->slots[0]) * ksm->num_slots);
kvfree(ksm->slots);
memzero_explicit(ksm, sizeof(*ksm));
}
EXPORT_SYMBOL_GPL(blk_ksm_destroy);
bool blk_ksm_register(struct blk_keyslot_manager *ksm, struct request_queue *q)
{
if (blk_integrity_queue_supports_integrity(q)) {
pr_warn("Integrity and hardware inline encryption are not supported together. Disabling hardware inline encryption.\n");
return false;
}
q->ksm = ksm;
return true;
}
EXPORT_SYMBOL_GPL(blk_ksm_register);
void blk_ksm_unregister(struct request_queue *q)
{
q->ksm = NULL;
}

2
block/kyber-iosched.c
View File

@ -579,7 +579,7 @@ static bool kyber_bio_merge(struct blk_mq_hw_ctx *hctx, struct bio *bio,
return merged;
}
static void kyber_prepare_request(struct request *rq, struct bio *bio)
static void kyber_prepare_request(struct request *rq)
{
rq_set_domain_token(rq, -1);
}

2
block/mq-deadline.c
View File

@ -541,7 +541,7 @@ static void dd_insert_requests(struct blk_mq_hw_ctx *hctx,
* Nothing to do here. This is defined only to ensure that .finish_request
* method is called upon request completion.
*/
static void dd_prepare_request(struct request *rq, struct bio *bio)
static void dd_prepare_request(struct request *rq)
{
}

187
block/partitions/core.c
View File

@ -274,10 +274,10 @@ struct device_type part_type = {
.uevent = part_uevent,
};
static void delete_partition_work_fn(struct work_struct *work)
static void hd_struct_free_work(struct work_struct *work)
{
struct hd_struct *part = container_of(to_rcu_work(work), struct hd_struct,
rcu_work);
struct hd_struct *part =
container_of(to_rcu_work(work), struct hd_struct, rcu_work);
part->start_sect = 0;
part->nr_sects = 0;
@ -285,32 +285,42 @@ static void delete_partition_work_fn(struct work_struct *work)
put_device(part_to_dev(part));
}
void __delete_partition(struct percpu_ref *ref)
static void hd_struct_free(struct percpu_ref *ref)
{
struct hd_struct *part = container_of(ref, struct hd_struct, ref);
INIT_RCU_WORK(&part->rcu_work, delete_partition_work_fn);
struct gendisk *disk = part_to_disk(part);
struct disk_part_tbl *ptbl =
rcu_dereference_protected(disk->part_tbl, 1);
rcu_assign_pointer(ptbl->last_lookup, NULL);
put_device(disk_to_dev(disk));
INIT_RCU_WORK(&part->rcu_work, hd_struct_free_work);
queue_rcu_work(system_wq, &part->rcu_work);
}
int hd_ref_init(struct hd_struct *part)
{
if (percpu_ref_init(&part->ref, hd_struct_free, 0, GFP_KERNEL))
return -ENOMEM;
return 0;
}
/*
* Must be called either with bd_mutex held, before a disk can be opened or
* after all disk users are gone.
*/
void delete_partition(struct gendisk *disk, int partno)
void delete_partition(struct gendisk *disk, struct hd_struct *part)
{
struct disk_part_tbl *ptbl =
rcu_dereference_protected(disk->part_tbl, 1);
struct hd_struct *part;
if (partno >= ptbl->len)
return;
part = rcu_dereference_protected(ptbl->part[partno], 1);
if (!part)
return;
rcu_assign_pointer(ptbl->part[partno], NULL);
rcu_assign_pointer(ptbl->last_lookup, NULL);
/*
* ->part_tbl is referenced in this part's release handler, so
* we have to hold the disk device
*/
get_device(disk_to_dev(part_to_disk(part)));
rcu_assign_pointer(ptbl->part[part->partno], NULL);
kobject_put(part->holder_dir);
device_del(part_to_dev(part));
@ -321,7 +331,7 @@ void delete_partition(struct gendisk *disk, int partno)
* "in-use" until we really free the gendisk.
*/
blk_invalidate_devt(part_devt(part));
hd_struct_kill(part);
percpu_ref_kill(&part->ref);
}
static ssize_t whole_disk_show(struct device *dev,
@ -335,7 +345,7 @@ static DEVICE_ATTR(whole_disk, 0444, whole_disk_show, NULL);
* Must be called either with bd_mutex held, before a disk can be opened or
* after all disk users are gone.
*/
struct hd_struct *add_partition(struct gendisk *disk, int partno,
static struct hd_struct *add_partition(struct gendisk *disk, int partno,
sector_t start, sector_t len, int flags,
struct partition_meta_info *info)
{
@ -377,12 +387,13 @@ struct hd_struct *add_partition(struct gendisk *disk, int partno,
if (!p)
return ERR_PTR(-EBUSY);
if (!init_part_stats(p)) {
p->dkstats = alloc_percpu(struct disk_stats);
if (!p->dkstats) {
err = -ENOMEM;
goto out_free;
}
seqcount_init(&p->nr_sects_seq);
hd_sects_seq_init(p);
pdev = part_to_dev(p);
p->start_sect = start;
@ -458,7 +469,7 @@ struct hd_struct *add_partition(struct gendisk *disk, int partno,
out_free_info:
kfree(p->info);
out_free_stats:
free_part_stats(p);
free_percpu(p->dkstats);
out_free:
kfree(p);
return ERR_PTR(err);
@ -472,6 +483,121 @@ out_put:
return ERR_PTR(err);
}
static bool partition_overlaps(struct gendisk *disk, sector_t start,
sector_t length, int skip_partno)
{
struct disk_part_iter piter;
struct hd_struct *part;
bool overlap = false;
disk_part_iter_init(&piter, disk, DISK_PITER_INCL_EMPTY);
while ((part = disk_part_iter_next(&piter))) {
if (part->partno == skip_partno ||
start >= part->start_sect + part->nr_sects ||
start + length <= part->start_sect)
continue;
overlap = true;
break;
}
disk_part_iter_exit(&piter);
return overlap;
}
int bdev_add_partition(struct block_device *bdev, int partno,
sector_t start, sector_t length)
{
struct hd_struct *part;
mutex_lock(&bdev->bd_mutex);
if (partition_overlaps(bdev->bd_disk, start, length, -1)) {
mutex_unlock(&bdev->bd_mutex);
return -EBUSY;
}
part = add_partition(bdev->bd_disk, partno, start, length,
ADDPART_FLAG_NONE, NULL);
mutex_unlock(&bdev->bd_mutex);
return PTR_ERR_OR_ZERO(part);
}
int bdev_del_partition(struct block_device *bdev, int partno)
{
struct block_device *bdevp;
struct hd_struct *part;
int ret = 0;
part = disk_get_part(bdev->bd_disk, partno);
if (!part)
return -ENXIO;
ret = -ENOMEM;
bdevp = bdget(part_devt(part));
if (!bdevp)
goto out_put_part;
mutex_lock(&bdevp->bd_mutex);
ret = -EBUSY;
if (bdevp->bd_openers)
goto out_unlock;
sync_blockdev(bdevp);
invalidate_bdev(bdevp);
mutex_lock_nested(&bdev->bd_mutex, 1);
delete_partition(bdev->bd_disk, part);
mutex_unlock(&bdev->bd_mutex);
ret = 0;
out_unlock:
mutex_unlock(&bdevp->bd_mutex);
bdput(bdevp);
out_put_part:
disk_put_part(part);
return ret;
}
int bdev_resize_partition(struct block_device *bdev, int partno,
sector_t start, sector_t length)
{
struct block_device *bdevp;
struct hd_struct *part;
int ret = 0;
part = disk_get_part(bdev->bd_disk, partno);
if (!part)
return -ENXIO;
ret = -ENOMEM;
bdevp = bdget(part_devt(part));
if (!bdevp)
goto out_put_part;
mutex_lock(&bdevp->bd_mutex);
mutex_lock_nested(&bdev->bd_mutex, 1);
ret = -EINVAL;
if (start != part->start_sect)
goto out_unlock;
ret = -EBUSY;
if (partition_overlaps(bdev->bd_disk, start, length, partno))
goto out_unlock;
part_nr_sects_write(part, (sector_t)length);
i_size_write(bdevp->bd_inode, length << SECTOR_SHIFT);
ret = 0;
out_unlock:
mutex_unlock(&bdevp->bd_mutex);
mutex_unlock(&bdev->bd_mutex);
bdput(bdevp);
out_put_part:
disk_put_part(part);
return ret;
}
static bool disk_unlock_native_capacity(struct gendisk *disk)
{
const struct block_device_operations *bdops = disk->fops;
@ -488,27 +614,30 @@ static bool disk_unlock_native_capacity(struct gendisk *disk)
}
}
int blk_drop_partitions(struct gendisk *disk, struct block_device *bdev)
int blk_drop_partitions(struct block_device *bdev)
{
struct disk_part_iter piter;
struct hd_struct *part;
int res;
if (!disk_part_scan_enabled(disk))
if (!disk_part_scan_enabled(bdev->bd_disk))
return 0;
if (bdev->bd_part_count)
return -EBUSY;
res = invalidate_partition(disk, 0);
if (res)
return res;
disk_part_iter_init(&piter, disk, DISK_PITER_INCL_EMPTY);
sync_blockdev(bdev);
invalidate_bdev(bdev);
disk_part_iter_init(&piter, bdev->bd_disk, DISK_PITER_INCL_EMPTY);
while ((part = disk_part_iter_next(&piter)))
delete_partition(disk, part->partno);
delete_partition(bdev->bd_disk, part);
disk_part_iter_exit(&piter);
return 0;
}
#ifdef CONFIG_S390
/* for historic reasons in the DASD driver */
EXPORT_SYMBOL_GPL(blk_drop_partitions);
#endif
static bool blk_add_partition(struct gendisk *disk, struct block_device *bdev,
struct parsed_partitions *state, int p)

30
drivers/ata/libata-scsi.c
View File

@ -649,7 +649,7 @@ static void ata_qc_set_pc_nbytes(struct ata_queued_cmd *qc)
{
struct scsi_cmnd *scmd = qc->scsicmd;
qc->extrabytes = scmd->request->extra_len;
qc->extrabytes = scmd->extra_len;
qc->nbytes = scsi_bufflen(scmd) + qc->extrabytes;
}
@ -1017,16 +1017,11 @@ void ata_scsi_sdev_config(struct scsi_device *sdev)
* RETURNS:
* 1 if ; otherwise, 0.
*/
static int atapi_drain_needed(struct request *rq)
bool ata_scsi_dma_need_drain(struct request *rq)
{
if (likely(!blk_rq_is_passthrough(rq)))
return 0;
if (!blk_rq_bytes(rq) || op_is_write(req_op(rq)))
return 0;
return atapi_cmd_type(scsi_req(rq)->cmd[0]) == ATAPI_MISC;
}
EXPORT_SYMBOL_GPL(ata_scsi_dma_need_drain);
int ata_scsi_dev_config(struct scsi_device *sdev, struct ata_device *dev)
{
@ -1039,21 +1034,21 @@ int ata_scsi_dev_config(struct scsi_device *sdev, struct ata_device *dev)
blk_queue_max_hw_sectors(q, dev->max_sectors);
if (dev->class == ATA_DEV_ATAPI) {
void *buf;
sdev->sector_size = ATA_SECT_SIZE;
/* set DMA padding */
blk_queue_update_dma_pad(q, ATA_DMA_PAD_SZ - 1);
/* configure draining */
buf = kmalloc(ATAPI_MAX_DRAIN, q->bounce_gfp | GFP_KERNEL);
if (!buf) {
/* make room for appending the drain */
blk_queue_max_segments(q, queue_max_segments(q) - 1);
sdev->dma_drain_len = ATAPI_MAX_DRAIN;
sdev->dma_drain_buf = kmalloc(sdev->dma_drain_len,
q->bounce_gfp | GFP_KERNEL);
if (!sdev->dma_drain_buf) {
ata_dev_err(dev, "drain buffer allocation failed\n");
return -ENOMEM;
}
blk_queue_dma_drain(q, atapi_drain_needed, buf, ATAPI_MAX_DRAIN);
} else {
sdev->sector_size = ata_id_logical_sector_size(dev->id);
sdev->manage_start_stop = 1;
@ -1135,7 +1130,6 @@ EXPORT_SYMBOL_GPL(ata_scsi_slave_config);
void ata_scsi_slave_destroy(struct scsi_device *sdev)
{
struct ata_port *ap = ata_shost_to_port(sdev->host);
struct request_queue *q = sdev->request_queue;
unsigned long flags;
struct ata_device *dev;
@ -1152,9 +1146,7 @@ void ata_scsi_slave_destroy(struct scsi_device *sdev)
}
spin_unlock_irqrestore(ap->lock, flags);
kfree(q->dma_drain_buffer);
q->dma_drain_buffer = NULL;
q->dma_drain_size = 0;
kfree(sdev->dma_drain_buf);
}
EXPORT_SYMBOL_GPL(ata_scsi_slave_destroy);

37
drivers/base/core.c
View File

@ -3212,40 +3212,6 @@ error:
return ERR_PTR(retval);
}
/**
* device_create_vargs - creates a device and registers it with sysfs
* @class: pointer to the struct class that this device should be registered to
* @parent: pointer to the parent struct device of this new device, if any
* @devt: the dev_t for the char device to be added
* @drvdata: the data to be added to the device for callbacks
* @fmt: string for the device's name
* @args: va_list for the device's name
*
* This function can be used by char device classes. A struct device
* will be created in sysfs, registered to the specified class.
*
* A "dev" file will be created, showing the dev_t for the device, if
* the dev_t is not 0,0.
* If a pointer to a parent struct device is passed in, the newly created
* struct device will be a child of that device in sysfs.
* The pointer to the struct device will be returned from the call.
* Any further sysfs files that might be required can be created using this
* pointer.
*
* Returns &struct device pointer on success, or ERR_PTR() on error.
*
* Note: the struct class passed to this function must have previously
* been created with a call to class_create().
*/
struct device *device_create_vargs(struct class *class, struct device *parent,
dev_t devt, void *drvdata, const char *fmt,
va_list args)
{
return device_create_groups_vargs(class, parent, devt, drvdata, NULL,
fmt, args);
}
EXPORT_SYMBOL_GPL(device_create_vargs);
/**
* device_create - creates a device and registers it with sysfs
* @class: pointer to the struct class that this device should be registered to
@ -3277,7 +3243,8 @@ struct device *device_create(struct class *class, struct device *parent,
struct device *dev;
va_start(vargs, fmt);
dev = device_create_vargs(class, parent, devt, drvdata, fmt, vargs);
dev = device_create_groups_vargs(class, parent, devt, drvdata, NULL,
fmt, vargs);
va_end(vargs);
return dev;
}

1
drivers/block/aoe/aoeblk.c
View File

@ -407,7 +407,6 @@ aoeblk_gdalloc(void *vp)
WARN_ON(d->gd);
WARN_ON(d->flags & DEVFL_UP);
blk_queue_max_hw_sectors(q, BLK_DEF_MAX_SECTORS);
q->backing_dev_info->name = "aoe";
q->backing_dev_info->ra_pages = READ_AHEAD / PAGE_SIZE;
d->bufpool = mp;
d->blkq = gd->queue = q;

27
drivers/block/drbd/drbd_req.c
View File

@ -21,24 +21,6 @@
static bool drbd_may_do_local_read(struct drbd_device *device, sector_t sector, int size);
/* Update disk stats at start of I/O request */
static void _drbd_start_io_acct(struct drbd_device *device, struct drbd_request *req)
{
struct request_queue *q = device->rq_queue;
generic_start_io_acct(q, bio_op(req->master_bio),
req->i.size >> 9, &device->vdisk->part0);
}
/* Update disk stats when completing request upwards */
static void _drbd_end_io_acct(struct drbd_device *device, struct drbd_request *req)
{
struct request_queue *q = device->rq_queue;
generic_end_io_acct(q, bio_op(req->master_bio),
&device->vdisk->part0, req->start_jif);
}
static struct drbd_request *drbd_req_new(struct drbd_device *device, struct bio *bio_src)
{
struct drbd_request *req;
@ -263,7 +245,7 @@ void drbd_req_complete(struct drbd_request *req, struct bio_and_error *m)
start_new_tl_epoch(first_peer_device(device)->connection);
/* Update disk stats */
_drbd_end_io_acct(device, req);
bio_end_io_acct(req->master_bio, req->start_jif);
/* If READ failed,
* have it be pushed back to the retry work queue,
@ -1222,16 +1204,15 @@ drbd_request_prepare(struct drbd_device *device, struct bio *bio, unsigned long
bio_endio(bio);
return ERR_PTR(-ENOMEM);
}
req->start_jif = start_jif;
/* Update disk stats */
req->start_jif = bio_start_io_acct(req->master_bio);
if (!get_ldev(device)) {
bio_put(req->private_bio);
req->private_bio = NULL;
}
/* Update disk stats */
_drbd_start_io_acct(device, req);
/* process discards always from our submitter thread */
if (bio_op(bio) == REQ_OP_WRITE_ZEROES ||
bio_op(bio) == REQ_OP_DISCARD)

2
drivers/block/loop.c
View File

@ -2037,7 +2037,7 @@ static int loop_add(struct loop_device **l, int i)
lo->tag_set.queue_depth = 128;
lo->tag_set.numa_node = NUMA_NO_NODE;
lo->tag_set.cmd_size = sizeof(struct loop_cmd);
lo->tag_set.flags = BLK_MQ_F_SHOULD_MERGE;
lo->tag_set.flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_STACKING;
lo->tag_set.driver_data = lo;
err = blk_mq_alloc_tag_set(&lo->tag_set);

28
drivers/block/null_blk_main.c
View File

@ -1250,8 +1250,34 @@ static inline blk_status_t null_handle_memory_backed(struct nullb_cmd *cmd,
return errno_to_blk_status(err);
}
static void nullb_zero_read_cmd_buffer(struct nullb_cmd *cmd)
{
struct nullb_device *dev = cmd->nq->dev;
struct bio *bio;
if (dev->memory_backed)
return;
if (dev->queue_mode == NULL_Q_BIO && bio_op(cmd->bio) == REQ_OP_READ) {
zero_fill_bio(cmd->bio);
} else if (req_op(cmd->rq) == REQ_OP_READ) {
__rq_for_each_bio(bio, cmd->rq)
zero_fill_bio(bio);
}
}
static inline void nullb_complete_cmd(struct nullb_cmd *cmd)
{
/*
* Since root privileges are required to configure the null_blk
* driver, it is fine that this driver does not initialize the
* data buffers of read commands. Zero-initialize these buffers
* anyway if KMSAN is enabled to prevent that KMSAN complains
* about null_blk not initializing read data buffers.
*/
if (IS_ENABLED(CONFIG_KMSAN))
nullb_zero_read_cmd_buffer(cmd);
/* Complete IO by inline, softirq or timer */
switch (cmd->nq->dev->irqmode) {
case NULL_IRQ_SOFTIRQ:
@ -1397,7 +1423,7 @@ static bool should_requeue_request(struct request *rq)
static enum blk_eh_timer_return null_timeout_rq(struct request *rq, bool res)
{
pr_info("rq %p timed out\n", rq);
blk_mq_complete_request(rq);
blk_mq_force_complete_rq(rq);
return BLK_EH_DONE;
}

37
drivers/block/null_blk_zoned.c
View File

@ -74,13 +74,20 @@ int null_init_zoned_dev(struct nullb_device *dev, struct request_queue *q)
int null_register_zoned_dev(struct nullb *nullb)
{
struct nullb_device *dev = nullb->dev;
struct request_queue *q = nullb->q;
if (queue_is_mq(q))
return blk_revalidate_disk_zones(nullb->disk);
if (queue_is_mq(q)) {
int ret = blk_revalidate_disk_zones(nullb->disk, NULL);
blk_queue_chunk_sectors(q, nullb->dev->zone_size_sects);
q->nr_zones = blkdev_nr_zones(nullb->disk);
if (ret)
return ret;
} else {
blk_queue_chunk_sectors(q, dev->zone_size_sects);
q->nr_zones = blkdev_nr_zones(nullb->disk);
}
blk_queue_max_zone_append_sectors(q, dev->zone_size_sects);
return 0;
}
@ -142,7 +149,7 @@ size_t null_zone_valid_read_len(struct nullb *nullb,
}
static blk_status_t null_zone_write(struct nullb_cmd *cmd, sector_t sector,
unsigned int nr_sectors)
unsigned int nr_sectors, bool append)
{
struct nullb_device *dev = cmd->nq->dev;
unsigned int zno = null_zone_no(dev, sector);
@ -162,9 +169,21 @@ static blk_status_t null_zone_write(struct nullb_cmd *cmd, sector_t sector,
case BLK_ZONE_COND_IMP_OPEN:
case BLK_ZONE_COND_EXP_OPEN:
case BLK_ZONE_COND_CLOSED:
/* Writes must be at the write pointer position */
if (sector != zone->wp)
/*
* Regular writes must be at the write pointer position.
* Zone append writes are automatically issued at the write
* pointer and the position returned using the request or BIO
* sector.
*/
if (append) {
sector = zone->wp;
if (cmd->bio)
cmd->bio->bi_iter.bi_sector = sector;
else
cmd->rq->__sector = sector;
} else if (sector != zone->wp) {
return BLK_STS_IOERR;
}
if (zone->cond != BLK_ZONE_COND_EXP_OPEN)
zone->cond = BLK_ZONE_COND_IMP_OPEN;
@ -246,7 +265,9 @@ blk_status_t null_process_zoned_cmd(struct nullb_cmd *cmd, enum req_opf op,
{
switch (op) {
case REQ_OP_WRITE:
return null_zone_write(cmd, sector, nr_sectors);
return null_zone_write(cmd, sector, nr_sectors, false);
case REQ_OP_ZONE_APPEND:
return null_zone_write(cmd, sector, nr_sectors, true);
case REQ_OP_ZONE_RESET:
case REQ_OP_ZONE_RESET_ALL:
case REQ_OP_ZONE_OPEN:

2
drivers/block/paride/pcd.c
View File

@ -1032,7 +1032,7 @@ static int __init pcd_init(void)
for (unit = 0, cd = pcd; unit < PCD_UNITS; unit++, cd++) {
if (cd->present) {
register_cdrom(&cd->info);
register_cdrom(cd->disk, &cd->info);
cd->disk->private_data = cd;
add_disk(cd->disk);
}

19
drivers/block/rsxx/dev.c
View File

@ -96,20 +96,6 @@ static const struct block_device_operations rsxx_fops = {
.ioctl = rsxx_blkdev_ioctl,
};
static void disk_stats_start(struct rsxx_cardinfo *card, struct bio *bio)
{
generic_start_io_acct(card->queue, bio_op(bio), bio_sectors(bio),
&card->gendisk->part0);
}
static void disk_stats_complete(struct rsxx_cardinfo *card,
struct bio *bio,
unsigned long start_time)
{
generic_end_io_acct(card->queue, bio_op(bio),
&card->gendisk->part0, start_time);
}
static void bio_dma_done_cb(struct rsxx_cardinfo *card,
void *cb_data,
unsigned int error)
@ -121,7 +107,7 @@ static void bio_dma_done_cb(struct rsxx_cardinfo *card,
if (atomic_dec_and_test(&meta->pending_dmas)) {
if (!card->eeh_state && card->gendisk)
disk_stats_complete(card, meta->bio, meta->start_time);
bio_end_io_acct(meta->bio, meta->start_time);
if (atomic_read(&meta->error))
bio_io_error(meta->bio);
@ -167,10 +153,9 @@ static blk_qc_t rsxx_make_request(struct request_queue *q, struct bio *bio)
bio_meta->bio = bio;
atomic_set(&bio_meta->error, 0);
atomic_set(&bio_meta->pending_dmas, 0);
bio_meta->start_time = jiffies;
if (!unlikely(card->halt))
disk_stats_start(card, bio);
bio_meta->start_time = bio_start_io_acct(bio);
dev_dbg(CARD_TO_DEV(card), "BIO[%c]: meta: %p addr8: x%llx size: %d\n",
bio_data_dir(bio) ? 'W' : 'R', bio_meta,

24
drivers/block/zram/zram_drv.c
View File

@ -1510,13 +1510,8 @@ static void zram_bio_discard(struct zram *zram, u32 index,
static int zram_bvec_rw(struct zram *zram, struct bio_vec *bvec, u32 index,
int offset, unsigned int op, struct bio *bio)
{
unsigned long start_time = jiffies;
struct request_queue *q = zram->disk->queue;
int ret;
generic_start_io_acct(q, op, bvec->bv_len >> SECTOR_SHIFT,
&zram->disk->part0);
if (!op_is_write(op)) {
atomic64_inc(&zram->stats.num_reads);
ret = zram_bvec_read(zram, bvec, index, offset, bio);
@ -1526,8 +1521,6 @@ static int zram_bvec_rw(struct zram *zram, struct bio_vec *bvec, u32 index,
ret = zram_bvec_write(zram, bvec, index, offset, bio);
}
generic_end_io_acct(q, op, &zram->disk->part0, start_time);
zram_slot_lock(zram, index);
zram_accessed(zram, index);
zram_slot_unlock(zram, index);
@ -1548,6 +1541,7 @@ static void __zram_make_request(struct zram *zram, struct bio *bio)
u32 index;
struct bio_vec bvec;
struct bvec_iter iter;
unsigned long start_time;
index = bio->bi_iter.bi_sector >> SECTORS_PER_PAGE_SHIFT;
offset = (bio->bi_iter.bi_sector &
@ -1563,6 +1557,7 @@ static void __zram_make_request(struct zram *zram, struct bio *bio)
break;
}
start_time = bio_start_io_acct(bio);
bio_for_each_segment(bvec, bio, iter) {
struct bio_vec bv = bvec;
unsigned int unwritten = bvec.bv_len;
@ -1571,8 +1566,10 @@ static void __zram_make_request(struct zram *zram, struct bio *bio)
bv.bv_len = min_t(unsigned int, PAGE_SIZE - offset,
unwritten);
if (zram_bvec_rw(zram, &bv, index, offset,
bio_op(bio), bio) < 0)
goto out;
bio_op(bio), bio) < 0) {
bio->bi_status = BLK_STS_IOERR;
break;
}
bv.bv_offset += bv.bv_len;
unwritten -= bv.bv_len;
@ -1580,12 +1577,8 @@ static void __zram_make_request(struct zram *zram, struct bio *bio)
update_position(&index, &offset, &bv);
} while (unwritten);
}
bio_end_io_acct(bio, start_time);
bio_endio(bio);
return;
out:
bio_io_error(bio);
}
/*
@ -1633,6 +1626,7 @@ static int zram_rw_page(struct block_device *bdev, sector_t sector,
u32 index;
struct zram *zram;
struct bio_vec bv;
unsigned long start_time;
if (PageTransHuge(page))
return -ENOTSUPP;
@ -1651,7 +1645,9 @@ static int zram_rw_page(struct block_device *bdev, sector_t sector,
bv.bv_len = PAGE_SIZE;
bv.bv_offset = 0;
start_time = disk_start_io_acct(bdev->bd_disk, SECTORS_PER_PAGE, op);
ret = zram_bvec_rw(zram, &bv, index, offset, op, NULL);
disk_end_io_acct(bdev->bd_disk, op, start_time);
out:
/*
* If I/O fails, just return error(ie, non-zero) without

85
drivers/cdrom/cdrom.c
View File

@ -586,7 +586,7 @@ static int cdrom_mrw_set_lba_space(struct cdrom_device_info *cdi, int space)
return 0;
}
int register_cdrom(struct cdrom_device_info *cdi)
int register_cdrom(struct gendisk *disk, struct cdrom_device_info *cdi)
{
static char banner_printed;
const struct cdrom_device_ops *cdo = cdi->ops;
@ -601,6 +601,9 @@ int register_cdrom(struct cdrom_device_info *cdi)
cdrom_sysctl_register();
}
cdi->disk = disk;
disk->cdi = cdi;
ENSURE(cdo, drive_status, CDC_DRIVE_STATUS);
if (cdo->check_events == NULL && cdo->media_changed == NULL)
WARN_ON_ONCE(cdo->capability & (CDC_MEDIA_CHANGED | CDC_SELECT_DISC));
@ -2292,37 +2295,46 @@ retry:
return cdrom_read_cdda_old(cdi, ubuf, lba, nframes);
}
static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
void __user *argp)
int cdrom_multisession(struct cdrom_device_info *cdi,
struct cdrom_multisession *info)
{
struct cdrom_multisession ms_info;
u8 requested_format;
int ret;
cd_dbg(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
if (!(cdi->ops->capability & CDC_MULTI_SESSION))
return -ENOSYS;
if (copy_from_user(&ms_info, argp, sizeof(ms_info)))
return -EFAULT;
requested_format = ms_info.addr_format;
requested_format = info->addr_format;
if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
return -EINVAL;
ms_info.addr_format = CDROM_LBA;
info->addr_format = CDROM_LBA;
ret = cdi->ops->get_last_session(cdi, &ms_info);
ret = cdi->ops->get_last_session(cdi, info);
if (!ret)
sanitize_format(&info->addr, &info->addr_format,
requested_format);
return ret;
}
EXPORT_SYMBOL_GPL(cdrom_multisession);
static int cdrom_ioctl_multisession(struct cdrom_device_info *cdi,
void __user *argp)
{
struct cdrom_multisession info;
int ret;
cd_dbg(CD_DO_IOCTL, "entering CDROMMULTISESSION\n");
if (copy_from_user(&info, argp, sizeof(info)))
return -EFAULT;
ret = cdrom_multisession(cdi, &info);
if (ret)
return ret;
sanitize_format(&ms_info.addr, &ms_info.addr_format, requested_format);
if (copy_to_user(argp, &ms_info, sizeof(ms_info)))
if (copy_to_user(argp, &info, sizeof(info)))
return -EFAULT;
cd_dbg(CD_DO_IOCTL, "CDROMMULTISESSION successful\n");
return 0;
return ret;
}
static int cdrom_ioctl_eject(struct cdrom_device_info *cdi)
@ -2663,32 +2675,37 @@ static int cdrom_ioctl_read_tochdr(struct cdrom_device_info *cdi,
return 0;
}
int cdrom_read_tocentry(struct cdrom_device_info *cdi,
struct cdrom_tocentry *entry)
{
u8 requested_format = entry->cdte_format;
int ret;
if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
return -EINVAL;
/* make interface to low-level uniform */
entry->cdte_format = CDROM_MSF;
ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, entry);
if (!ret)
sanitize_format(&entry->cdte_addr, &entry->cdte_format,
requested_format);
return ret;
}
EXPORT_SYMBOL_GPL(cdrom_read_tocentry);
static int cdrom_ioctl_read_tocentry(struct cdrom_device_info *cdi,
void __user *argp)
{
struct cdrom_tocentry entry;
u8 requested_format;
int ret;
/* cd_dbg(CD_DO_IOCTL, "entering CDROMREADTOCENTRY\n"); */
if (copy_from_user(&entry, argp, sizeof(entry)))
return -EFAULT;
requested_format = entry.cdte_format;
if (requested_format != CDROM_MSF && requested_format != CDROM_LBA)
return -EINVAL;
/* make interface to low-level uniform */
entry.cdte_format = CDROM_MSF;
ret = cdi->ops->audio_ioctl(cdi, CDROMREADTOCENTRY, &entry);
if (ret)
return ret;
sanitize_format(&entry.cdte_addr, &entry.cdte_format, requested_format);
if (copy_to_user(argp, &entry, sizeof(entry)))
ret = cdrom_read_tocentry(cdi, &entry);
if (!ret && copy_to_user(argp, &entry, sizeof(entry)))
return -EFAULT;
/* cd_dbg(CD_DO_IOCTL, "CDROMREADTOCENTRY successful\n"); */
return 0;
return ret;
}
static int cdrom_ioctl_play_msf(struct cdrom_device_info *cdi,

2
drivers/cdrom/gdrom.c
View File

@ -770,7 +770,7 @@ static int probe_gdrom(struct platform_device *devptr)
goto probe_fail_no_disk;
}
probe_gdrom_setupdisk();
if (register_cdrom(gd.cd_info)) {
if (register_cdrom(gd.disk, gd.cd_info)) {
err = -ENODEV;
goto probe_fail_cdrom_register;
}

17
drivers/ide/ide-cd.c
View File

@ -1034,8 +1034,8 @@ static int cdrom_read_capacity(ide_drive_t *drive, unsigned long *capacity,
return 0;
}
static int cdrom_read_tocentry(ide_drive_t *drive, int trackno, int msf_flag,
int format, char *buf, int buflen)
static int ide_cdrom_read_tocentry(ide_drive_t *drive, int trackno,
int msf_flag, int format, char *buf, int buflen)
{
unsigned char cmd[BLK_MAX_CDB];
@ -1104,7 +1104,7 @@ int ide_cd_read_toc(ide_drive_t *drive)
sectors_per_frame << SECTOR_SHIFT);
/* first read just the header, so we know how long the TOC is */
stat = cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
stat = ide_cdrom_read_tocentry(drive, 0, 1, 0, (char *) &toc->hdr,
sizeof(struct atapi_toc_header));
if (stat)
return stat;
@ -1121,7 +1121,7 @@ int ide_cd_read_toc(ide_drive_t *drive)
ntracks = MAX_TRACKS;
/* now read the whole schmeer */
stat = cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
stat = ide_cdrom_read_tocentry(drive, toc->hdr.first_track, 1, 0,
(char *)&toc->hdr,
sizeof(struct atapi_toc_header) +
(ntracks + 1) *
@ -1141,7 +1141,7 @@ int ide_cd_read_toc(ide_drive_t *drive)
* Heiko Eißfeldt.
*/
ntracks = 0;
stat = cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
stat = ide_cdrom_read_tocentry(drive, CDROM_LEADOUT, 1, 0,
(char *)&toc->hdr,
sizeof(struct atapi_toc_header) +
(ntracks + 1) *
@ -1181,7 +1181,7 @@ int ide_cd_read_toc(ide_drive_t *drive)
if (toc->hdr.first_track != CDROM_LEADOUT) {
/* read the multisession information */
stat = cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
stat = ide_cdrom_read_tocentry(drive, 0, 0, 1, (char *)&ms_tmp,
sizeof(ms_tmp));
if (stat)
return stat;
@ -1195,7 +1195,7 @@ int ide_cd_read_toc(ide_drive_t *drive)
if (drive->atapi_flags & IDE_AFLAG_TOCADDR_AS_BCD) {
/* re-read multisession information using MSF format */
stat = cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
stat = ide_cdrom_read_tocentry(drive, 0, 1, 1, (char *)&ms_tmp,
sizeof(ms_tmp));
if (stat)
return stat;
@ -1305,8 +1305,7 @@ static int ide_cdrom_register(ide_drive_t *drive, int nslots)
if (drive->atapi_flags & IDE_AFLAG_NO_SPEED_SELECT)
devinfo->mask |= CDC_SELECT_SPEED;
devinfo->disk = info->disk;
return register_cdrom(devinfo);
return register_cdrom(info->disk, devinfo);
}
static int ide_cdrom_probe_capabilities(ide_drive_t *drive)

7
drivers/ide/ide-io.c
View File

@ -233,10 +233,13 @@ static ide_startstop_t do_special(ide_drive_t *drive)
void ide_map_sg(ide_drive_t *drive, struct ide_cmd *cmd)
{
ide_hwif_t *hwif = drive->hwif;
struct scatterlist *sg = hwif->sg_table;
struct scatterlist *sg = hwif->sg_table, *last_sg = NULL;
struct request *rq = cmd->rq;
cmd->sg_nents = blk_rq_map_sg(drive->queue, rq, sg);
cmd->sg_nents = __blk_rq_map_sg(drive->queue, rq, sg, &last_sg);
if (blk_rq_bytes(rq) && (blk_rq_bytes(rq) & rq->q->dma_pad_mask))
last_sg->length +=
(rq->q->dma_pad_mask & ~blk_rq_bytes(rq)) + 1;
}
EXPORT_SYMBOL_GPL(ide_map_sg);

8
drivers/lightnvm/pblk-cache.c
View File

@ -21,16 +21,14 @@
void pblk_write_to_cache(struct pblk *pblk, struct bio *bio,
unsigned long flags)
{
struct request_queue *q = pblk->dev->q;
struct pblk_w_ctx w_ctx;
sector_t lba = pblk_get_lba(bio);
unsigned long start_time = jiffies;
unsigned long start_time;
unsigned int bpos, pos;
int nr_entries = pblk_get_secs(bio);
int i, ret;
generic_start_io_acct(q, REQ_OP_WRITE, bio_sectors(bio),
&pblk->disk->part0);
start_time = bio_start_io_acct(bio);
/* Update the write buffer head (mem) with the entries that we can
* write. The write in itself cannot fail, so there is no need to
@ -79,7 +77,7 @@ retry:
pblk_rl_inserted(&pblk->rl, nr_entries);
out:
generic_end_io_acct(q, REQ_OP_WRITE, &pblk->disk->part0, start_time);
bio_end_io_acct(bio, start_time);
pblk_write_should_kick(pblk);
if (ret == NVM_IO_DONE)

11
drivers/lightnvm/pblk-read.c
View File

@ -187,12 +187,11 @@ static void pblk_end_user_read(struct bio *bio, int error)
static void __pblk_end_io_read(struct pblk *pblk, struct nvm_rq *rqd,
bool put_line)
{
struct nvm_tgt_dev *dev = pblk->dev;
struct pblk_g_ctx *r_ctx = nvm_rq_to_pdu(rqd);
struct bio *int_bio = rqd->bio;
unsigned long start_time = r_ctx->start_time;
generic_end_io_acct(dev->q, REQ_OP_READ, &pblk->disk->part0, start_time);
bio_end_io_acct(int_bio, start_time);
if (rqd->error)
pblk_log_read_err(pblk, rqd);
@ -263,17 +262,15 @@ retry:
void pblk_submit_read(struct pblk *pblk, struct bio *bio)
{
struct nvm_tgt_dev *dev = pblk->dev;
struct request_queue *q = dev->q;
sector_t blba = pblk_get_lba(bio);
unsigned int nr_secs = pblk_get_secs(bio);
bool from_cache;
struct pblk_g_ctx *r_ctx;
struct nvm_rq *rqd;
struct bio *int_bio, *split_bio;
unsigned long start_time;
generic_start_io_acct(q, REQ_OP_READ, bio_sectors(bio),
&pblk->disk->part0);
start_time = bio_start_io_acct(bio);
rqd = pblk_alloc_rqd(pblk, PBLK_READ);
@ -283,7 +280,7 @@ void pblk_submit_read(struct pblk *pblk, struct bio *bio)
rqd->end_io = pblk_end_io_read;
r_ctx = nvm_rq_to_pdu(rqd);
r_ctx->start_time = jiffies;
r_ctx->start_time = start_time;
r_ctx->lba = blba;
if (pblk_alloc_rqd_meta(pblk, rqd)) {

19
drivers/md/bcache/request.c
View File

@ -668,9 +668,7 @@ static void backing_request_endio(struct bio *bio)
static void bio_complete(struct search *s)
{
if (s->orig_bio) {
generic_end_io_acct(s->d->disk->queue, bio_op(s->orig_bio),
&s->d->disk->part0, s->start_time);
bio_end_io_acct(s->orig_bio, s->start_time);
trace_bcache_request_end(s->d, s->orig_bio);
s->orig_bio->bi_status = s->iop.status;
bio_endio(s->orig_bio);
@ -730,7 +728,7 @@ static inline struct search *search_alloc(struct bio *bio,
s->recoverable = 1;
s->write = op_is_write(bio_op(bio));
s->read_dirty_data = 0;
s->start_time = jiffies;
s->start_time = bio_start_io_acct(bio);
s->iop.c = d->c;
s->iop.bio = NULL;
@ -1082,8 +1080,7 @@ static void detached_dev_end_io(struct bio *bio)
bio->bi_end_io = ddip->bi_end_io;
bio->bi_private = ddip->bi_private;
generic_end_io_acct(ddip->d->disk->queue, bio_op(bio),
&ddip->d->disk->part0, ddip->start_time);
bio_end_io_acct(bio, ddip->start_time);
if (bio->bi_status) {
struct cached_dev *dc = container_of(ddip->d,
@ -1108,7 +1105,7 @@ static void detached_dev_do_request(struct bcache_device *d, struct bio *bio)
*/
ddip = kzalloc(sizeof(struct detached_dev_io_private), GFP_NOIO);
ddip->d = d;
ddip->start_time = jiffies;
ddip->start_time = bio_start_io_acct(bio);
ddip->bi_end_io = bio->bi_end_io;
ddip->bi_private = bio->bi_private;
bio->bi_end_io = detached_dev_end_io;
@ -1190,11 +1187,6 @@ blk_qc_t cached_dev_make_request(struct request_queue *q, struct bio *bio)
}
}
generic_start_io_acct(q,
bio_op(bio),
bio_sectors(bio),
&d->disk->part0);
bio_set_dev(bio, dc->bdev);
bio->bi_iter.bi_sector += dc->sb.data_offset;
@ -1311,8 +1303,6 @@ blk_qc_t flash_dev_make_request(struct request_queue *q, struct bio *bio)
return BLK_QC_T_NONE;
}
generic_start_io_acct(q, bio_op(bio), bio_sectors(bio), &d->disk->part0);
s = search_alloc(bio, d);
cl = &s->cl;
bio = &s->bio.bio;
@ -1372,7 +1362,6 @@ void bch_flash_dev_request_init(struct bcache_device *d)
{
struct gendisk *g = d->disk;
g->queue->make_request_fn = flash_dev_make_request;
g->queue->backing_dev_info->congested_fn = flash_dev_congested;
d->cache_miss = flash_dev_cache_miss;
d->ioctl = flash_dev_ioctl;

2
drivers/md/dm-integrity.c
View File

@ -2657,7 +2657,7 @@ static void bitmap_flush_work(struct work_struct *work)
dm_integrity_flush_buffers(ic);
if (ic->meta_dev)
blkdev_issue_flush(ic->dev->bdev, GFP_NOIO, NULL);
blkdev_issue_flush(ic->dev->bdev, GFP_NOIO);
limit = ic->provided_data_sectors;
if (ic->sb->flags & cpu_to_le32(SB_FLAG_RECALCULATING)) {

2
drivers/md/dm-rq.c
View File

@ -547,7 +547,7 @@ int dm_mq_init_request_queue(struct mapped_device *md, struct dm_table *t)
md->tag_set->ops = &dm_mq_ops;
md->tag_set->queue_depth = dm_get_blk_mq_queue_depth();
md->tag_set->numa_node = md->numa_node_id;
md->tag_set->flags = BLK_MQ_F_SHOULD_MERGE;
md->tag_set->flags = BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_STACKING;
md->tag_set->nr_hw_queues = dm_get_blk_mq_nr_hw_queues();
md->tag_set->driver_data = md;

17
drivers/md/dm-table.c
View File

@ -279,7 +279,6 @@ static struct dm_dev_internal *find_device(struct list_head *l, dev_t dev)
static int device_area_is_invalid(struct dm_target *ti, struct dm_dev *dev,
sector_t start, sector_t len, void *data)
{
struct request_queue *q;
struct queue_limits *limits = data;
struct block_device *bdev = dev->bdev;
sector_t dev_size =
@ -288,22 +287,6 @@ static int device_area_is_invalid(struct dm_target *ti, struct dm_dev *dev,
limits->logical_block_size >> SECTOR_SHIFT;
char b[BDEVNAME_SIZE];
/*
* Some devices exist without request functions,
* such as loop devices not yet bound to backing files.
* Forbid the use of such devices.
*/
q = bdev_get_queue(bdev);
if (!q || !q->make_request_fn) {
DMWARN("%s: %s is not yet initialised: "
"start=%llu, len=%llu, dev_size=%llu",
dm_device_name(ti->table->md), bdevname(bdev, b),
(unsigned long long)start,
(unsigned long long)len,
(unsigned long long)dev_size);
return 1;
}
if (!dev_size)
return 0;

6
drivers/md/dm-zoned-metadata.c
View File

@ -661,7 +661,7 @@ static int dmz_write_sb(struct dmz_metadata *zmd, unsigned int set)
ret = dmz_rdwr_block(zmd, REQ_OP_WRITE, block, mblk->page);
if (ret == 0)
ret = blkdev_issue_flush(zmd->dev->bdev, GFP_NOIO, NULL);
ret = blkdev_issue_flush(zmd->dev->bdev, GFP_NOIO);
return ret;
}
@ -703,7 +703,7 @@ static int dmz_write_dirty_mblocks(struct dmz_metadata *zmd,
/* Flush drive cache (this will also sync data) */
if (ret == 0)
ret = blkdev_issue_flush(zmd->dev->bdev, GFP_NOIO, NULL);
ret = blkdev_issue_flush(zmd->dev->bdev, GFP_NOIO);
return ret;
}
@ -772,7 +772,7 @@ int dmz_flush_metadata(struct dmz_metadata *zmd)
/* If there are no dirty metadata blocks, just flush the device cache */
if (list_empty(&write_list)) {
ret = blkdev_issue_flush(zmd->dev->bdev, GFP_NOIO, NULL);
ret = blkdev_issue_flush(zmd->dev->bdev, GFP_NOIO);
goto err;
}

24
drivers/md/dm.c
View File

@ -26,6 +26,7 @@
#include <linux/pr.h>
#include <linux/refcount.h>
#include <linux/part_stat.h>
#include <linux/blk-crypto.h>
#define DM_MSG_PREFIX "core"
@ -680,11 +681,7 @@ static void start_io_acct(struct dm_io *io)
struct mapped_device *md = io->md;
struct bio *bio = io->orig_bio;
io->start_time = jiffies;
generic_start_io_acct(md->queue, bio_op(bio), bio_sectors(bio),
&dm_disk(md)->part0);
io->start_time = bio_start_io_acct(bio);
if (unlikely(dm_stats_used(&md->stats)))
dm_stats_account_io(&md->stats, bio_data_dir(bio),
bio->bi_iter.bi_sector, bio_sectors(bio),
@ -697,8 +694,7 @@ static void end_io_acct(struct dm_io *io)
struct bio *bio = io->orig_bio;
unsigned long duration = jiffies - io->start_time;
generic_end_io_acct(md->queue, bio_op(bio), &dm_disk(md)->part0,
io->start_time);
bio_end_io_acct(bio, io->start_time);
if (unlikely(dm_stats_used(&md->stats)))
dm_stats_account_io(&md->stats, bio_data_dir(bio),
@ -1334,6 +1330,8 @@ static int clone_bio(struct dm_target_io *tio, struct bio *bio,
__bio_clone_fast(clone, bio);
bio_crypt_clone(clone, bio, GFP_NOIO);
if (bio_integrity(bio)) {
int r;
@ -1788,6 +1786,18 @@ static blk_qc_t dm_make_request(struct request_queue *q, struct bio *bio)
int srcu_idx;
struct dm_table *map;
if (dm_get_md_type(md) == DM_TYPE_REQUEST_BASED) {
/*
* We are called with a live reference on q_usage_counter, but
* that one will be released as soon as we return. Grab an
* extra one as blk_mq_make_request expects to be able to
* consume a reference (which lives until the request is freed
* in case a request is allocated).
*/
percpu_ref_get(&q->q_usage_counter);
return blk_mq_make_request(q, bio);
}
map = dm_get_live_table(md, &srcu_idx);
/* if we're suspended, we have to queue this io for later */

2
drivers/md/raid5-ppl.c
View File

@ -1037,7 +1037,7 @@ static int ppl_recover(struct ppl_log *log, struct ppl_header *pplhdr,
}
/* flush the disk cache after recovery if necessary */
ret = blkdev_issue_flush(rdev->bdev, GFP_KERNEL, NULL);
ret = blkdev_issue_flush(rdev->bdev, GFP_KERNEL);
out:
__free_page(page);
return ret;

3
drivers/mtd/mtdcore.c
View File

@ -2036,11 +2036,10 @@ static struct backing_dev_info * __init mtd_bdi_init(char *name)
struct backing_dev_info *bdi;
int ret;
bdi = bdi_alloc(GFP_KERNEL);
bdi = bdi_alloc(NUMA_NO_NODE);
if (!bdi)
return ERR_PTR(-ENOMEM);
bdi->name = name;
/*
* We put '-0' suffix to the name to get the same name format as we
* used to get. Since this is called only once, we get a unique name.

6
drivers/nvdimm/blk.c
View File

@ -178,7 +178,9 @@ static blk_qc_t nd_blk_make_request(struct request_queue *q, struct bio *bio)
bip = bio_integrity(bio);
nsblk = q->queuedata;
rw = bio_data_dir(bio);
do_acct = nd_iostat_start(bio, &start);
do_acct = blk_queue_io_stat(bio->bi_disk->queue);
if (do_acct)
start = bio_start_io_acct(bio);
bio_for_each_segment(bvec, bio, iter) {
unsigned int len = bvec.bv_len;
@ -195,7 +197,7 @@ static blk_qc_t nd_blk_make_request(struct request_queue *q, struct bio *bio)
}
}
if (do_acct)
nd_iostat_end(bio, start);
bio_end_io_acct(bio, start);
bio_endio(bio);
return BLK_QC_T_NONE;

6
drivers/nvdimm/btt.c
View File

@ -1452,7 +1452,9 @@ static blk_qc_t btt_make_request(struct request_queue *q, struct bio *bio)
if (!bio_integrity_prep(bio))
return BLK_QC_T_NONE;
do_acct = nd_iostat_start(bio, &start);
do_acct = blk_queue_io_stat(bio->bi_disk->queue);
if (do_acct)
start = bio_start_io_acct(bio);
bio_for_each_segment(bvec, bio, iter) {
unsigned int len = bvec.bv_len;
@ -1477,7 +1479,7 @@ static blk_qc_t btt_make_request(struct request_queue *q, struct bio *bio)
}
}
if (do_acct)
nd_iostat_end(bio, start);
bio_end_io_acct(bio, start);
bio_endio(bio);
return BLK_QC_T_NONE;

19
drivers/nvdimm/nd.h
View File

@ -396,25 +396,6 @@ static inline int nvdimm_setup_pfn(struct nd_pfn *nd_pfn,
#endif
int nd_blk_region_init(struct nd_region *nd_region);
int nd_region_activate(struct nd_region *nd_region);
void __nd_iostat_start(struct bio *bio, unsigned long *start);
static inline bool nd_iostat_start(struct bio *bio, unsigned long *start)
{
struct gendisk *disk = bio->bi_disk;
if (!blk_queue_io_stat(disk->queue))
return false;
*start = jiffies;
generic_start_io_acct(disk->queue, bio_op(bio), bio_sectors(bio),
&disk->part0);
return true;
}
static inline void nd_iostat_end(struct bio *bio, unsigned long start)
{
struct gendisk *disk = bio->bi_disk;
generic_end_io_acct(disk->queue, bio_op(bio), &disk->part0, start);
}
static inline bool is_bad_pmem(struct badblocks *bb, sector_t sector,
unsigned int len)
{

6
drivers/nvdimm/pmem.c
View File

@ -202,7 +202,9 @@ static blk_qc_t pmem_make_request(struct request_queue *q, struct bio *bio)
if (bio->bi_opf & REQ_PREFLUSH)
ret = nvdimm_flush(nd_region, bio);
do_acct = nd_iostat_start(bio, &start);
do_acct = blk_queue_io_stat(bio->bi_disk->queue);
if (do_acct)
start = bio_start_io_acct(bio);
bio_for_each_segment(bvec, bio, iter) {
if (op_is_write(bio_op(bio)))
rc = pmem_do_write(pmem, bvec.bv_page, bvec.bv_offset,
@ -216,7 +218,7 @@ static blk_qc_t pmem_make_request(struct request_queue *q, struct bio *bio)
}
}
if (do_acct)
nd_iostat_end(bio, start);
bio_end_io_acct(bio, start);
if (bio->bi_opf & REQ_FUA)
ret = nvdimm_flush(nd_region, bio);

2
drivers/nvme/host/core.c
View File

@ -310,7 +310,7 @@ bool nvme_cancel_request(struct request *req, void *data, bool reserved)
return true;
nvme_req(req)->status = NVME_SC_HOST_ABORTED_CMD;
blk_mq_complete_request(req);
blk_mq_force_complete_rq(req);
return true;
}
EXPORT_SYMBOL_GPL(nvme_cancel_request);

2
drivers/nvme/target/io-cmd-bdev.c
View File

@ -226,7 +226,7 @@ static void nvmet_bdev_execute_flush(struct nvmet_req *req)
u16 nvmet_bdev_flush(struct nvmet_req *req)
{
if (blkdev_issue_flush(req->ns->bdev, GFP_KERNEL, NULL))
if (blkdev_issue_flush(req->ns->bdev, GFP_KERNEL))
return NVME_SC_INTERNAL | NVME_SC_DNR;
return 0;
}

18
drivers/s390/block/dasd_genhd.c
View File

@ -143,9 +143,6 @@ int dasd_scan_partitions(struct dasd_block *block)
*/
void dasd_destroy_partitions(struct dasd_block *block)
{
/* The two structs have 168/176 byte on 31/64 bit. */
struct blkpg_partition bpart;
struct blkpg_ioctl_arg barg;
struct block_device *bdev;
/*
@ -155,19 +152,10 @@ void dasd_destroy_partitions(struct dasd_block *block)
bdev = block->bdev;
block->bdev = NULL;
/*
* See fs/partition/check.c:delete_partition
* Can't call delete_partitions directly. Use ioctl.
* The ioctl also does locking and invalidation.
*/
memset(&bpart, 0, sizeof(struct blkpg_partition));
memset(&barg, 0, sizeof(struct blkpg_ioctl_arg));
barg.data = (void __force __user *) &bpart;
barg.op = BLKPG_DEL_PARTITION;
for (bpart.pno = block->gdp->minors - 1; bpart.pno > 0; bpart.pno--)
ioctl_by_bdev(bdev, BLKPG, (unsigned long) &barg);
mutex_lock(&bdev->bd_mutex);
blk_drop_partitions(bdev);
mutex_unlock(&bdev->bd_mutex);
invalidate_partition(block->gdp, 0);
/* Matching blkdev_put to the blkdev_get in dasd_scan_partitions. */
blkdev_put(bdev, FMODE_READ);
set_capacity(block->gdp, 0);

87
drivers/scsi/scsi_lib.c
View File

@ -978,28 +978,12 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
scsi_io_completion_action(cmd, result);
}
static blk_status_t scsi_init_sgtable(struct request *req,
struct scsi_data_buffer *sdb)
static inline bool scsi_cmd_needs_dma_drain(struct scsi_device *sdev,
struct request *rq)
{
int count;
/*
* If sg table allocation fails, requeue request later.
*/
if (unlikely(sg_alloc_table_chained(&sdb->table,
blk_rq_nr_phys_segments(req), sdb->table.sgl,
SCSI_INLINE_SG_CNT)))
return BLK_STS_RESOURCE;
/*
* Next, walk the list, and fill in the addresses and sizes of
* each segment.
*/
count = blk_rq_map_sg(req->q, req, sdb->table.sgl);
BUG_ON(count > sdb->table.nents);
sdb->table.nents = count;
sdb->length = blk_rq_payload_bytes(req);
return BLK_STS_OK;
return sdev->dma_drain_len && blk_rq_is_passthrough(rq) &&
!op_is_write(req_op(rq)) &&
sdev->host->hostt->dma_need_drain(rq);
}
/*
@ -1015,19 +999,62 @@ static blk_status_t scsi_init_sgtable(struct request *req,
*/
blk_status_t scsi_init_io(struct scsi_cmnd *cmd)
{
struct scsi_device *sdev = cmd->device;
struct request *rq = cmd->request;
unsigned short nr_segs = blk_rq_nr_phys_segments(rq);
struct scatterlist *last_sg = NULL;
blk_status_t ret;
bool need_drain = scsi_cmd_needs_dma_drain(sdev, rq);
int count;
if (WARN_ON_ONCE(!blk_rq_nr_phys_segments(rq)))
if (WARN_ON_ONCE(!nr_segs))
return BLK_STS_IOERR;
ret = scsi_init_sgtable(rq, &cmd->sdb);
if (ret)
return ret;
/*
* Make sure there is space for the drain. The driver must adjust
* max_hw_segments to be prepared for this.
*/
if (need_drain)
nr_segs++;
/*
* If sg table allocation fails, requeue request later.
*/
if (unlikely(sg_alloc_table_chained(&cmd->sdb.table, nr_segs,
cmd->sdb.table.sgl, SCSI_INLINE_SG_CNT)))
return BLK_STS_RESOURCE;
/*
* Next, walk the list, and fill in the addresses and sizes of
* each segment.
*/
count = __blk_rq_map_sg(rq->q, rq, cmd->sdb.table.sgl, &last_sg);
if (blk_rq_bytes(rq) & rq->q->dma_pad_mask) {
unsigned int pad_len =
(rq->q->dma_pad_mask & ~blk_rq_bytes(rq)) + 1;
last_sg->length += pad_len;
cmd->extra_len += pad_len;
}
if (need_drain) {
sg_unmark_end(last_sg);
last_sg = sg_next(last_sg);
sg_set_buf(last_sg, sdev->dma_drain_buf, sdev->dma_drain_len);
sg_mark_end(last_sg);
cmd->extra_len += sdev->dma_drain_len;
count++;
}
BUG_ON(count > cmd->sdb.table.nents);
cmd->sdb.table.nents = count;
cmd->sdb.length = blk_rq_payload_bytes(rq);
if (blk_integrity_rq(rq)) {
struct scsi_data_buffer *prot_sdb = cmd->prot_sdb;
int ivecs, count;
int ivecs;
if (WARN_ON_ONCE(!prot_sdb)) {
/*
@ -1610,12 +1637,7 @@ static bool scsi_mq_get_budget(struct blk_mq_hw_ctx *hctx)
struct request_queue *q = hctx->queue;
struct scsi_device *sdev = q->queuedata;
if (scsi_dev_queue_ready(q, sdev))
return true;
if (atomic_read(&sdev->device_busy) == 0 && !scsi_device_blocked(sdev))
blk_mq_delay_run_hw_queue(hctx, SCSI_QUEUE_DELAY);
return false;
return scsi_dev_queue_ready(q, sdev);
}
static blk_status_t scsi_queue_rq(struct blk_mq_hw_ctx *hctx,
@ -1684,6 +1706,7 @@ out_put_budget:
case BLK_STS_OK:
break;
case BLK_STS_RESOURCE:
case BLK_STS_ZONE_RESOURCE:
if (atomic_read(&sdev->device_busy) ||
scsi_device_blocked(sdev))
ret = BLK_STS_DEV_RESOURCE;

16
drivers/scsi/sd.c
View File

@ -1206,6 +1206,12 @@ static blk_status_t sd_setup_read_write_cmnd(struct scsi_cmnd *cmd)
}
}
if (req_op(rq) == REQ_OP_ZONE_APPEND) {
ret = sd_zbc_prepare_zone_append(cmd, &lba, nr_blocks);
if (ret)
return ret;
}
fua = rq->cmd_flags & REQ_FUA ? 0x8 : 0;
dix = scsi_prot_sg_count(cmd);
dif = scsi_host_dif_capable(cmd->device->host, sdkp->protection_type);
@ -1287,6 +1293,7 @@ static blk_status_t sd_init_command(struct scsi_cmnd *cmd)
return sd_setup_flush_cmnd(cmd);
case REQ_OP_READ:
case REQ_OP_WRITE:
case REQ_OP_ZONE_APPEND:
return sd_setup_read_write_cmnd(cmd);
case REQ_OP_ZONE_RESET:
return sd_zbc_setup_zone_mgmt_cmnd(cmd, ZO_RESET_WRITE_POINTER,
@ -2055,7 +2062,7 @@ static int sd_done(struct scsi_cmnd *SCpnt)
out:
if (sd_is_zoned(sdkp))
sd_zbc_complete(SCpnt, good_bytes, &sshdr);
good_bytes = sd_zbc_complete(SCpnt, good_bytes, &sshdr);
SCSI_LOG_HLCOMPLETE(1, scmd_printk(KERN_INFO, SCpnt,
"sd_done: completed %d of %d bytes\n",
@ -3372,6 +3379,10 @@ static int sd_probe(struct device *dev)
sdkp->first_scan = 1;
sdkp->max_medium_access_timeouts = SD_MAX_MEDIUM_TIMEOUTS;
error = sd_zbc_init_disk(sdkp);
if (error)
goto out_free_index;
sd_revalidate_disk(gd);
gd->flags = GENHD_FL_EXT_DEVT;
@ -3409,6 +3420,7 @@ static int sd_probe(struct device *dev)
out_put:
put_disk(gd);
out_free:
sd_zbc_release_disk(sdkp);
kfree(sdkp);
out:
scsi_autopm_put_device(sdp);
@ -3485,6 +3497,8 @@ static void scsi_disk_release(struct device *dev)
put_disk(disk);
put_device(&sdkp->device->sdev_gendev);
sd_zbc_release_disk(sdkp);
kfree(sdkp);
}

43
drivers/scsi/sd.h
View File

@ -79,6 +79,12 @@ struct scsi_disk {
u32 zones_optimal_open;
u32 zones_optimal_nonseq;
u32 zones_max_open;
u32 *zones_wp_offset;
spinlock_t zones_wp_offset_lock;
u32 *rev_wp_offset;
struct mutex rev_mutex;
struct work_struct zone_wp_offset_work;
char *zone_wp_update_buf;
#endif
atomic_t openers;
sector_t capacity; /* size in logical blocks */
@ -207,17 +213,35 @@ static inline int sd_is_zoned(struct scsi_disk *sdkp)
#ifdef CONFIG_BLK_DEV_ZONED
int sd_zbc_init_disk(struct scsi_disk *sdkp);
void sd_zbc_release_disk(struct scsi_disk *sdkp);
extern int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buffer);
extern void sd_zbc_print_zones(struct scsi_disk *sdkp);
blk_status_t sd_zbc_setup_zone_mgmt_cmnd(struct scsi_cmnd *cmd,
unsigned char op, bool all);
extern void sd_zbc_complete(struct scsi_cmnd *cmd, unsigned int good_bytes,
struct scsi_sense_hdr *sshdr);
unsigned int sd_zbc_complete(struct scsi_cmnd *cmd, unsigned int good_bytes,
struct scsi_sense_hdr *sshdr);
int sd_zbc_report_zones(struct gendisk *disk, sector_t sector,
unsigned int nr_zones, report_zones_cb cb, void *data);
blk_status_t sd_zbc_prepare_zone_append(struct scsi_cmnd *cmd, sector_t *lba,
unsigned int nr_blocks);
#else /* CONFIG_BLK_DEV_ZONED */
static inline int sd_zbc_init(void)
{
return 0;
}
static inline int sd_zbc_init_disk(struct scsi_disk *sdkp)
{
return 0;
}
static inline void sd_zbc_exit(void) {}
static inline void sd_zbc_release_disk(struct scsi_disk *sdkp) {}
static inline int sd_zbc_read_zones(struct scsi_disk *sdkp,
unsigned char *buf)
{
@ -233,9 +257,18 @@ static inline blk_status_t sd_zbc_setup_zone_mgmt_cmnd(struct scsi_cmnd *cmd,
return BLK_STS_TARGET;
}
static inline void sd_zbc_complete(struct scsi_cmnd *cmd,
unsigned int good_bytes,
struct scsi_sense_hdr *sshdr) {}
static inline unsigned int sd_zbc_complete(struct scsi_cmnd *cmd,
unsigned int good_bytes, struct scsi_sense_hdr *sshdr)
{
return 0;
}
static inline blk_status_t sd_zbc_prepare_zone_append(struct scsi_cmnd *cmd,
sector_t *lba,
unsigned int nr_blocks)
{
return BLK_STS_TARGET;
}
#define sd_zbc_report_zones NULL

405
drivers/scsi/sd_zbc.c
View File

@ -11,6 +11,7 @@
#include <linux/blkdev.h>
#include <linux/vmalloc.h>
#include <linux/sched/mm.h>
#include <linux/mutex.h>
#include <asm/unaligned.h>
@ -19,11 +20,36 @@
#include "sd.h"
static unsigned int sd_zbc_get_zone_wp_offset(struct blk_zone *zone)
{
if (zone->type == ZBC_ZONE_TYPE_CONV)
return 0;
switch (zone->cond) {
case BLK_ZONE_COND_IMP_OPEN:
case BLK_ZONE_COND_EXP_OPEN:
case BLK_ZONE_COND_CLOSED:
return zone->wp - zone->start;
case BLK_ZONE_COND_FULL:
return zone->len;
case BLK_ZONE_COND_EMPTY:
case BLK_ZONE_COND_OFFLINE:
case BLK_ZONE_COND_READONLY:
default:
/*
* Offline and read-only zones do not have a valid
* write pointer. Use 0 as for an empty zone.
*/
return 0;
}
}
static int sd_zbc_parse_report(struct scsi_disk *sdkp, u8 *buf,
unsigned int idx, report_zones_cb cb, void *data)
{
struct scsi_device *sdp = sdkp->device;
struct blk_zone zone = { 0 };
int ret;
zone.type = buf[0] & 0x0f;
zone.cond = (buf[1] >> 4) & 0xf;
@ -39,7 +65,14 @@ static int sd_zbc_parse_report(struct scsi_disk *sdkp, u8 *buf,
zone.cond == ZBC_ZONE_COND_FULL)
zone.wp = zone.start + zone.len;
return cb(&zone, idx, data);
ret = cb(&zone, idx, data);
if (ret)
return ret;
if (sdkp->rev_wp_offset)
sdkp->rev_wp_offset[idx] = sd_zbc_get_zone_wp_offset(&zone);
return 0;
}
/**
@ -208,6 +241,136 @@ out:
return ret;
}
static blk_status_t sd_zbc_cmnd_checks(struct scsi_cmnd *cmd)
{
struct request *rq = cmd->request;
struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
sector_t sector = blk_rq_pos(rq);
if (!sd_is_zoned(sdkp))
/* Not a zoned device */
return BLK_STS_IOERR;
if (sdkp->device->changed)
return BLK_STS_IOERR;
if (sector & (sd_zbc_zone_sectors(sdkp) - 1))
/* Unaligned request */
return BLK_STS_IOERR;
return BLK_STS_OK;
}
#define SD_ZBC_INVALID_WP_OFST (~0u)
#define SD_ZBC_UPDATING_WP_OFST (SD_ZBC_INVALID_WP_OFST - 1)
static int sd_zbc_update_wp_offset_cb(struct blk_zone *zone, unsigned int idx,
void *data)
{
struct scsi_disk *sdkp = data;
lockdep_assert_held(&sdkp->zones_wp_offset_lock);
sdkp->zones_wp_offset[idx] = sd_zbc_get_zone_wp_offset(zone);
return 0;
}
static void sd_zbc_update_wp_offset_workfn(struct work_struct *work)
{
struct scsi_disk *sdkp;
unsigned int zno;
int ret;
sdkp = container_of(work, struct scsi_disk, zone_wp_offset_work);
spin_lock_bh(&sdkp->zones_wp_offset_lock);
for (zno = 0; zno < sdkp->nr_zones; zno++) {
if (sdkp->zones_wp_offset[zno] != SD_ZBC_UPDATING_WP_OFST)
continue;
spin_unlock_bh(&sdkp->zones_wp_offset_lock);
ret = sd_zbc_do_report_zones(sdkp, sdkp->zone_wp_update_buf,
SD_BUF_SIZE,
zno * sdkp->zone_blocks, true);
spin_lock_bh(&sdkp->zones_wp_offset_lock);
if (!ret)
sd_zbc_parse_report(sdkp, sdkp->zone_wp_update_buf + 64,
zno, sd_zbc_update_wp_offset_cb,
sdkp);
}
spin_unlock_bh(&sdkp->zones_wp_offset_lock);
scsi_device_put(sdkp->device);
}
/**
* sd_zbc_prepare_zone_append() - Prepare an emulated ZONE_APPEND command.
* @cmd: the command to setup
* @lba: the LBA to patch
* @nr_blocks: the number of LBAs to be written
*
* Called from sd_setup_read_write_cmnd() for REQ_OP_ZONE_APPEND.
* @sd_zbc_prepare_zone_append() handles the necessary zone wrote locking and
* patching of the lba for an emulated ZONE_APPEND command.
*
* In case the cached write pointer offset is %SD_ZBC_INVALID_WP_OFST it will
* schedule a REPORT ZONES command and return BLK_STS_IOERR.
*/
blk_status_t sd_zbc_prepare_zone_append(struct scsi_cmnd *cmd, sector_t *lba,
unsigned int nr_blocks)
{
struct request *rq = cmd->request;
struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
unsigned int wp_offset, zno = blk_rq_zone_no(rq);
blk_status_t ret;
ret = sd_zbc_cmnd_checks(cmd);
if (ret != BLK_STS_OK)
return ret;
if (!blk_rq_zone_is_seq(rq))
return BLK_STS_IOERR;
/* Unlock of the write lock will happen in sd_zbc_complete() */
if (!blk_req_zone_write_trylock(rq))
return BLK_STS_ZONE_RESOURCE;
spin_lock_bh(&sdkp->zones_wp_offset_lock);
wp_offset = sdkp->zones_wp_offset[zno];
switch (wp_offset) {
case SD_ZBC_INVALID_WP_OFST:
/*
* We are about to schedule work to update a zone write pointer
* offset, which will cause the zone append command to be
* requeued. So make sure that the scsi device does not go away
* while the work is being processed.
*/
if (scsi_device_get(sdkp->device)) {
ret = BLK_STS_IOERR;
break;
}
sdkp->zones_wp_offset[zno] = SD_ZBC_UPDATING_WP_OFST;
schedule_work(&sdkp->zone_wp_offset_work);
fallthrough;
case SD_ZBC_UPDATING_WP_OFST:
ret = BLK_STS_DEV_RESOURCE;
break;
default:
wp_offset = sectors_to_logical(sdkp->device, wp_offset);
if (wp_offset + nr_blocks > sdkp->zone_blocks) {
ret = BLK_STS_IOERR;
break;
}
*lba += wp_offset;
}
spin_unlock_bh(&sdkp->zones_wp_offset_lock);
if (ret)
blk_req_zone_write_unlock(rq);
return ret;
}
/**
* sd_zbc_setup_zone_mgmt_cmnd - Prepare a zone ZBC_OUT command. The operations
* can be RESET WRITE POINTER, OPEN, CLOSE or FINISH.
@ -222,20 +385,14 @@ blk_status_t sd_zbc_setup_zone_mgmt_cmnd(struct scsi_cmnd *cmd,
unsigned char op, bool all)
{
struct request *rq = cmd->request;
struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
sector_t sector = blk_rq_pos(rq);
struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
sector_t block = sectors_to_logical(sdkp->device, sector);
blk_status_t ret;
if (!sd_is_zoned(sdkp))
/* Not a zoned device */
return BLK_STS_IOERR;
if (sdkp->device->changed)
return BLK_STS_IOERR;
if (sector & (sd_zbc_zone_sectors(sdkp) - 1))
/* Unaligned request */
return BLK_STS_IOERR;
ret = sd_zbc_cmnd_checks(cmd);
if (ret != BLK_STS_OK)
return ret;
cmd->cmd_len = 16;
memset(cmd->cmnd, 0, cmd->cmd_len);
@ -254,16 +411,105 @@ blk_status_t sd_zbc_setup_zone_mgmt_cmnd(struct scsi_cmnd *cmd,
return BLK_STS_OK;
}
static bool sd_zbc_need_zone_wp_update(struct request *rq)
{
switch (req_op(rq)) {
case REQ_OP_ZONE_APPEND:
case REQ_OP_ZONE_FINISH:
case REQ_OP_ZONE_RESET:
case REQ_OP_ZONE_RESET_ALL:
return true;
case REQ_OP_WRITE:
case REQ_OP_WRITE_ZEROES:
case REQ_OP_WRITE_SAME:
return blk_rq_zone_is_seq(rq);
default:
return false;
}
}
/**
* sd_zbc_zone_wp_update - Update cached zone write pointer upon cmd completion
* @cmd: Completed command
* @good_bytes: Command reply bytes
*
* Called from sd_zbc_complete() to handle the update of the cached zone write
* pointer value in case an update is needed.
*/
static unsigned int sd_zbc_zone_wp_update(struct scsi_cmnd *cmd,
unsigned int good_bytes)
{
int result = cmd->result;
struct request *rq = cmd->request;
struct scsi_disk *sdkp = scsi_disk(rq->rq_disk);
unsigned int zno = blk_rq_zone_no(rq);
enum req_opf op = req_op(rq);
/*
* If we got an error for a command that needs updating the write
* pointer offset cache, we must mark the zone wp offset entry as
* invalid to force an update from disk the next time a zone append
* command is issued.
*/
spin_lock_bh(&sdkp->zones_wp_offset_lock);
if (result && op != REQ_OP_ZONE_RESET_ALL) {
if (op == REQ_OP_ZONE_APPEND) {
/* Force complete completion (no retry) */
good_bytes = 0;
scsi_set_resid(cmd, blk_rq_bytes(rq));
}
/*
* Force an update of the zone write pointer offset on
* the next zone append access.
*/
if (sdkp->zones_wp_offset[zno] != SD_ZBC_UPDATING_WP_OFST)
sdkp->zones_wp_offset[zno] = SD_ZBC_INVALID_WP_OFST;
goto unlock_wp_offset;
}
switch (op) {
case REQ_OP_ZONE_APPEND:
rq->__sector += sdkp->zones_wp_offset[zno];
fallthrough;
case REQ_OP_WRITE_ZEROES:
case REQ_OP_WRITE_SAME:
case REQ_OP_WRITE:
if (sdkp->zones_wp_offset[zno] < sd_zbc_zone_sectors(sdkp))
sdkp->zones_wp_offset[zno] +=
good_bytes >> SECTOR_SHIFT;
break;
case REQ_OP_ZONE_RESET:
sdkp->zones_wp_offset[zno] = 0;
break;
case REQ_OP_ZONE_FINISH:
sdkp->zones_wp_offset[zno] = sd_zbc_zone_sectors(sdkp);
break;
case REQ_OP_ZONE_RESET_ALL:
memset(sdkp->zones_wp_offset, 0,
sdkp->nr_zones * sizeof(unsigned int));
break;
default:
break;
}
unlock_wp_offset:
spin_unlock_bh(&sdkp->zones_wp_offset_lock);
return good_bytes;
}
/**
* sd_zbc_complete - ZBC command post processing.
* @cmd: Completed command
* @good_bytes: Command reply bytes
* @sshdr: command sense header
*
* Called from sd_done(). Process report zones reply and handle reset zone
* and write commands errors.
* Called from sd_done() to handle zone commands errors and updates to the
* device queue zone write pointer offset cahce.
*/
void sd_zbc_complete(struct scsi_cmnd *cmd, unsigned int good_bytes,
unsigned int sd_zbc_complete(struct scsi_cmnd *cmd, unsigned int good_bytes,
struct scsi_sense_hdr *sshdr)
{
int result = cmd->result;
@ -279,7 +525,13 @@ void sd_zbc_complete(struct scsi_cmnd *cmd, unsigned int good_bytes,
* so be quiet about the error.
*/
rq->rq_flags |= RQF_QUIET;
}
} else if (sd_zbc_need_zone_wp_update(rq))
good_bytes = sd_zbc_zone_wp_update(cmd, good_bytes);
if (req_op(rq) == REQ_OP_ZONE_APPEND)
blk_req_zone_write_unlock(rq);
return good_bytes;
}
/**
@ -381,11 +633,67 @@ static int sd_zbc_check_capacity(struct scsi_disk *sdkp, unsigned char *buf,
return 0;
}
static void sd_zbc_revalidate_zones_cb(struct gendisk *disk)
{
struct scsi_disk *sdkp = scsi_disk(disk);
swap(sdkp->zones_wp_offset, sdkp->rev_wp_offset);
}
static int sd_zbc_revalidate_zones(struct scsi_disk *sdkp,
u32 zone_blocks,
unsigned int nr_zones)
{
struct gendisk *disk = sdkp->disk;
int ret = 0;
/*
* Make sure revalidate zones are serialized to ensure exclusive
* updates of the scsi disk data.
*/
mutex_lock(&sdkp->rev_mutex);
/*
* Revalidate the disk zones to update the device request queue zone
* bitmaps and the zone write pointer offset array. Do this only once
* the device capacity is set on the second revalidate execution for
* disk scan or if something changed when executing a normal revalidate.
*/
if (sdkp->first_scan) {
sdkp->zone_blocks = zone_blocks;
sdkp->nr_zones = nr_zones;
goto unlock;
}
if (sdkp->zone_blocks == zone_blocks &&
sdkp->nr_zones == nr_zones &&
disk->queue->nr_zones == nr_zones)
goto unlock;
sdkp->rev_wp_offset = kvcalloc(nr_zones, sizeof(u32), GFP_NOIO);
if (!sdkp->rev_wp_offset) {
ret = -ENOMEM;
goto unlock;
}
ret = blk_revalidate_disk_zones(disk, sd_zbc_revalidate_zones_cb);
kvfree(sdkp->rev_wp_offset);
sdkp->rev_wp_offset = NULL;
unlock:
mutex_unlock(&sdkp->rev_mutex);
return ret;
}
int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buf)
{
struct gendisk *disk = sdkp->disk;
struct request_queue *q = disk->queue;
unsigned int nr_zones;
u32 zone_blocks = 0;
u32 max_append;
int ret;
if (!sd_is_zoned(sdkp))
@ -406,35 +714,31 @@ int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buf)
goto err;
/* The drive satisfies the kernel restrictions: set it up */
blk_queue_flag_set(QUEUE_FLAG_ZONE_RESETALL, sdkp->disk->queue);
blk_queue_required_elevator_features(sdkp->disk->queue,
ELEVATOR_F_ZBD_SEQ_WRITE);
blk_queue_flag_set(QUEUE_FLAG_ZONE_RESETALL, q);
blk_queue_required_elevator_features(q, ELEVATOR_F_ZBD_SEQ_WRITE);
nr_zones = round_up(sdkp->capacity, zone_blocks) >> ilog2(zone_blocks);
/* READ16/WRITE16 is mandatory for ZBC disks */
sdkp->device->use_16_for_rw = 1;
sdkp->device->use_10_for_rw = 0;
/*
* Revalidate the disk zone bitmaps once the block device capacity is
* set on the second revalidate execution during disk scan and if
* something changed when executing a normal revalidate.
*/
if (sdkp->first_scan) {
sdkp->zone_blocks = zone_blocks;
sdkp->nr_zones = nr_zones;
return 0;
}
ret = sd_zbc_revalidate_zones(sdkp, zone_blocks, nr_zones);
if (ret)
goto err;
if (sdkp->zone_blocks != zone_blocks ||
sdkp->nr_zones != nr_zones ||
disk->queue->nr_zones != nr_zones) {
ret = blk_revalidate_disk_zones(disk);
if (ret != 0)
goto err;
sdkp->zone_blocks = zone_blocks;
sdkp->nr_zones = nr_zones;
}
/*
* On the first scan 'chunk_sectors' isn't setup yet, so calling
* blk_queue_max_zone_append_sectors() will result in a WARN(). Defer
* this setting to the second scan.
*/
if (sdkp->first_scan)
return 0;
max_append = min_t(u32, logical_to_sectors(sdkp->device, zone_blocks),
q->limits.max_segments << (PAGE_SHIFT - 9));
max_append = min_t(u32, max_append, queue_max_hw_sectors(q));
blk_queue_max_zone_append_sectors(q, max_append);
return 0;
@ -460,3 +764,28 @@ void sd_zbc_print_zones(struct scsi_disk *sdkp)
sdkp->nr_zones,
sdkp->zone_blocks);
}
int sd_zbc_init_disk(struct scsi_disk *sdkp)
{
if (!sd_is_zoned(sdkp))
return 0;
sdkp->zones_wp_offset = NULL;
spin_lock_init(&sdkp->zones_wp_offset_lock);
sdkp->rev_wp_offset = NULL;
mutex_init(&sdkp->rev_mutex);
INIT_WORK(&sdkp->zone_wp_offset_work, sd_zbc_update_wp_offset_workfn);
sdkp->zone_wp_update_buf = kzalloc(SD_BUF_SIZE, GFP_KERNEL);
if (!sdkp->zone_wp_update_buf)
return -ENOMEM;
return 0;
}
void sd_zbc_release_disk(struct scsi_disk *sdkp)
{
kvfree(sdkp->zones_wp_offset);
sdkp->zones_wp_offset = NULL;
kfree(sdkp->zone_wp_update_buf);
sdkp->zone_wp_update_buf = NULL;
}

3
drivers/scsi/sr.c
View File

@ -794,9 +794,8 @@ static int sr_probe(struct device *dev)
set_capacity(disk, cd->capacity);
disk->private_data = &cd->driver;
disk->queue = sdev->request_queue;
cd->cdi.disk = disk;
if (register_cdrom(&cd->cdi))
if (register_cdrom(disk, &cd->cdi))
goto fail_put;
/*

25
fs/block_dev.c
View File

@ -255,7 +255,7 @@ __blkdev_direct_IO_simple(struct kiocb *iocb, struct iov_iter *iter,
break;
if (!(iocb->ki_flags & IOCB_HIPRI) ||
!blk_poll(bdev_get_queue(bdev), qc, true))
io_schedule();
blk_io_schedule();
}
__set_current_state(TASK_RUNNING);
@ -449,7 +449,7 @@ __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter, int nr_pages)
if (!(iocb->ki_flags & IOCB_HIPRI) ||
!blk_poll(bdev_get_queue(bdev), qc, true))
io_schedule();
blk_io_schedule();
}
__set_current_state(TASK_RUNNING);
@ -671,7 +671,7 @@ int blkdev_fsync(struct file *filp, loff_t start, loff_t end, int datasync)
* i_mutex and doing so causes performance issues with concurrent
* O_SYNC writers to a block device.
*/
error = blkdev_issue_flush(bdev, GFP_KERNEL, NULL);
error = blkdev_issue_flush(bdev, GFP_KERNEL);
if (error == -EOPNOTSUPP)
error = 0;
@ -712,7 +712,6 @@ int bdev_read_page(struct block_device *bdev, sector_t sector,
blk_queue_exit(bdev->bd_queue);
return result;
}
EXPORT_SYMBOL_GPL(bdev_read_page);
/**
* bdev_write_page() - Start writing a page to a block device
@ -757,7 +756,6 @@ int bdev_write_page(struct block_device *bdev, sector_t sector,
blk_queue_exit(bdev->bd_queue);
return result;
}
EXPORT_SYMBOL_GPL(bdev_write_page);
/*
* pseudo-fs
@ -881,21 +879,6 @@ static int bdev_set(struct inode *inode, void *data)
static LIST_HEAD(all_bdevs);
/*
* If there is a bdev inode for this device, unhash it so that it gets evicted
* as soon as last inode reference is dropped.
*/
void bdev_unhash_inode(dev_t dev)
{
struct inode *inode;
inode = ilookup5(blockdev_superblock, hash(dev), bdev_test, &dev);
if (inode) {
remove_inode_hash(inode);
iput(inode);
}
}
struct block_device *bdget(dev_t dev)
{
struct block_device *bdev;
@ -1515,7 +1498,7 @@ int bdev_disk_changed(struct block_device *bdev, bool invalidate)
lockdep_assert_held(&bdev->bd_mutex);
rescan:
ret = blk_drop_partitions(disk, bdev);
ret = blk_drop_partitions(bdev);
if (ret)
return ret;

2
fs/direct-io.c
View File

@ -500,7 +500,7 @@ static struct bio *dio_await_one(struct dio *dio)
spin_unlock_irqrestore(&dio->bio_lock, flags);
if (!(dio->iocb->ki_flags & IOCB_HIPRI) ||
!blk_poll(dio->bio_disk->queue, dio->bio_cookie, true))
io_schedule();
blk_io_schedule();
/* wake up sets us TASK_RUNNING */
spin_lock_irqsave(&dio->bio_lock, flags);
dio->waiter = NULL;

2
fs/ext4/fsync.c
View File

@ -176,7 +176,7 @@ int ext4_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
ret = ext4_fsync_journal(inode, datasync, &needs_barrier);
if (needs_barrier) {
err = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
err = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL);
if (!ret)
ret = err;
}

2
fs/ext4/ialloc.c
View File

@ -1440,7 +1440,7 @@ int ext4_init_inode_table(struct super_block *sb, ext4_group_t group,
if (ret < 0)
goto err_out;
if (barrier)
blkdev_issue_flush(sb->s_bdev, GFP_NOFS, NULL);
blkdev_issue_flush(sb->s_bdev, GFP_NOFS);
skip_zeroout:
ext4_lock_group(sb, group);

2
fs/ext4/super.c
View File

@ -5296,7 +5296,7 @@ static int ext4_sync_fs(struct super_block *sb, int wait)
needs_barrier = true;
if (needs_barrier) {
int err;
err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL);
err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL);
if (!ret)
ret = err;
}

2
fs/fat/file.c
View File

@ -195,7 +195,7 @@ int fat_file_fsync(struct file *filp, loff_t start, loff_t end, int datasync)
if (err)
return err;
return blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
return blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL);
}

2
fs/fs-writeback.c
View File

@ -2319,7 +2319,7 @@ void __mark_inode_dirty(struct inode *inode, int flags)
WARN(bdi_cap_writeback_dirty(wb->bdi) &&
!test_bit(WB_registered, &wb->state),
"bdi-%s not registered\n", wb->bdi->name);
"bdi-%s not registered\n", bdi_dev_name(wb->bdi));
inode->dirtied_when = jiffies;
if (dirtytime)

32
fs/hfs/mdb.c
View File

@ -32,29 +32,35 @@
static int hfs_get_last_session(struct super_block *sb,
sector_t *start, sector_t *size)
{
struct cdrom_multisession ms_info;
struct cdrom_tocentry te;
int res;
struct cdrom_device_info *cdi = disk_to_cdi(sb->s_bdev->bd_disk);
/* default values */
*start = 0;
*size = i_size_read(sb->s_bdev->bd_inode) >> 9;
if (HFS_SB(sb)->session >= 0) {
struct cdrom_tocentry te;
if (!cdi)
return -EINVAL;
te.cdte_track = HFS_SB(sb)->session;
te.cdte_format = CDROM_LBA;
res = ioctl_by_bdev(sb->s_bdev, CDROMREADTOCENTRY, (unsigned long)&te);
if (!res && (te.cdte_ctrl & CDROM_DATA_TRACK) == 4) {
*start = (sector_t)te.cdte_addr.lba << 2;
return 0;
if (cdrom_read_tocentry(cdi, &te) ||
(te.cdte_ctrl & CDROM_DATA_TRACK) != 4) {
pr_err("invalid session number or type of track\n");
return -EINVAL;
}
pr_err("invalid session number or type of track\n");
return -EINVAL;
*start = (sector_t)te.cdte_addr.lba << 2;
} else if (cdi) {
struct cdrom_multisession ms_info;
ms_info.addr_format = CDROM_LBA;
if (cdrom_multisession(cdi, &ms_info) == 0 && ms_info.xa_flag)
*start = (sector_t)ms_info.addr.lba << 2;
}
ms_info.addr_format = CDROM_LBA;
res = ioctl_by_bdev(sb->s_bdev, CDROMMULTISESSION, (unsigned long)&ms_info);
if (!res && ms_info.xa_flag)
*start = (sector_t)ms_info.addr.lba << 2;
return 0;
}

2
fs/hfsplus/inode.c
View File

@ -340,7 +340,7 @@ int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
}
if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL);
inode_unlock(inode);

2
fs/hfsplus/super.c
View File

@ -239,7 +239,7 @@ out:
mutex_unlock(&sbi->vh_mutex);
if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL);
blkdev_issue_flush(sb->s_bdev, GFP_KERNEL);
return error;
}

33
fs/hfsplus/wrapper.c
View File

@ -127,31 +127,34 @@ static int hfsplus_read_mdb(void *bufptr, struct hfsplus_wd *wd)
static int hfsplus_get_last_session(struct super_block *sb,
sector_t *start, sector_t *size)
{
struct cdrom_multisession ms_info;
struct cdrom_tocentry te;
int res;
struct cdrom_device_info *cdi = disk_to_cdi(sb->s_bdev->bd_disk);
/* default values */
*start = 0;
*size = i_size_read(sb->s_bdev->bd_inode) >> 9;
if (HFSPLUS_SB(sb)->session >= 0) {
struct cdrom_tocentry te;
if (!cdi)
return -EINVAL;
te.cdte_track = HFSPLUS_SB(sb)->session;
te.cdte_format = CDROM_LBA;
res = ioctl_by_bdev(sb->s_bdev,
CDROMREADTOCENTRY, (unsigned long)&te);
if (!res && (te.cdte_ctrl & CDROM_DATA_TRACK) == 4) {
*start = (sector_t)te.cdte_addr.lba << 2;
return 0;
if (cdrom_read_tocentry(cdi, &te) ||
(te.cdte_ctrl & CDROM_DATA_TRACK) != 4) {
pr_err("invalid session number or type of track\n");
return -EINVAL;
}
pr_err("invalid session number or type of track\n");
return -EINVAL;
*start = (sector_t)te.cdte_addr.lba << 2;
} else if (cdi) {
struct cdrom_multisession ms_info;
ms_info.addr_format = CDROM_LBA;
if (cdrom_multisession(cdi, &ms_info) == 0 && ms_info.xa_flag)
*start = (sector_t)ms_info.addr.lba << 2;
}
ms_info.addr_format = CDROM_LBA;
res = ioctl_by_bdev(sb->s_bdev, CDROMMULTISESSION,
(unsigned long)&ms_info);
if (!res && ms_info.xa_flag)
*start = (sector_t)ms_info.addr.lba << 2;
return 0;
}

2
fs/iomap/direct-io.c
View File

@ -561,7 +561,7 @@ iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter,
!dio->submit.last_queue ||
!blk_poll(dio->submit.last_queue,
dio->submit.cookie, true))
io_schedule();
blk_io_schedule();
}
__set_current_state(TASK_RUNNING);
}

54
fs/isofs/inode.c
View File

@ -544,43 +544,41 @@ static int isofs_show_options(struct seq_file *m, struct dentry *root)
static unsigned int isofs_get_last_session(struct super_block *sb, s32 session)
{
struct cdrom_multisession ms_info;
unsigned int vol_desc_start;
struct block_device *bdev = sb->s_bdev;
int i;
struct cdrom_device_info *cdi = disk_to_cdi(sb->s_bdev->bd_disk);
unsigned int vol_desc_start = 0;
vol_desc_start=0;
ms_info.addr_format=CDROM_LBA;
if (session > 0) {
struct cdrom_tocentry Te;
Te.cdte_track=session;
Te.cdte_format=CDROM_LBA;
i = ioctl_by_bdev(bdev, CDROMREADTOCENTRY, (unsigned long) &Te);
if (!i) {
struct cdrom_tocentry te;
if (!cdi)
return 0;
te.cdte_track = session;
te.cdte_format = CDROM_LBA;
if (cdrom_read_tocentry(cdi, &te) == 0) {
printk(KERN_DEBUG "ISOFS: Session %d start %d type %d\n",
session, Te.cdte_addr.lba,
Te.cdte_ctrl&CDROM_DATA_TRACK);
if ((Te.cdte_ctrl&CDROM_DATA_TRACK) == 4)
return Te.cdte_addr.lba;
session, te.cdte_addr.lba,
te.cdte_ctrl & CDROM_DATA_TRACK);
if ((te.cdte_ctrl & CDROM_DATA_TRACK) == 4)
return te.cdte_addr.lba;
}
printk(KERN_ERR "ISOFS: Invalid session number or type of track\n");
}
i = ioctl_by_bdev(bdev, CDROMMULTISESSION, (unsigned long) &ms_info);
if (session > 0)
printk(KERN_ERR "ISOFS: Invalid session number\n");
#if 0
printk(KERN_DEBUG "isofs.inode: CDROMMULTISESSION: rc=%d\n",i);
if (i==0) {
printk(KERN_DEBUG "isofs.inode: XA disk: %s\n",ms_info.xa_flag?"yes":"no");
printk(KERN_DEBUG "isofs.inode: vol_desc_start = %d\n", ms_info.addr.lba);
}
#endif
if (i==0)
if (cdi) {
struct cdrom_multisession ms_info;
ms_info.addr_format = CDROM_LBA;
if (cdrom_multisession(cdi, &ms_info) == 0) {
#if WE_OBEY_THE_WRITTEN_STANDARDS
if (ms_info.xa_flag) /* necessary for a valid ms_info.addr */
/* necessary for a valid ms_info.addr */
if (ms_info.xa_flag)
#endif
vol_desc_start=ms_info.addr.lba;
vol_desc_start = ms_info.addr.lba;
}
}
return vol_desc_start;
}

2
fs/jbd2/checkpoint.c
View File

@ -414,7 +414,7 @@ int jbd2_cleanup_journal_tail(journal_t *journal)
* jbd2_cleanup_journal_tail() doesn't get called all that often.
*/
if (journal->j_flags & JBD2_BARRIER)
blkdev_issue_flush(journal->j_fs_dev, GFP_NOFS, NULL);
blkdev_issue_flush(journal->j_fs_dev, GFP_NOFS);
return __jbd2_update_log_tail(journal, first_tid, blocknr);
}

4
fs/jbd2/commit.c
View File

@ -775,7 +775,7 @@ start_journal_io:
if (commit_transaction->t_need_data_flush &&
(journal->j_fs_dev != journal->j_dev) &&
(journal->j_flags & JBD2_BARRIER))
blkdev_issue_flush(journal->j_fs_dev, GFP_NOFS, NULL);
blkdev_issue_flush(journal->j_fs_dev, GFP_NOFS);
/* Done it all: now write the commit record asynchronously. */
if (jbd2_has_feature_async_commit(journal)) {
@ -882,7 +882,7 @@ start_journal_io:
stats.run.rs_blocks_logged++;
if (jbd2_has_feature_async_commit(journal) &&
journal->j_flags & JBD2_BARRIER) {
blkdev_issue_flush(journal->j_dev, GFP_NOFS, NULL);
blkdev_issue_flush(journal->j_dev, GFP_NOFS);
}
if (err)

2
fs/jbd2/recovery.c
View File

@ -286,7 +286,7 @@ int jbd2_journal_recover(journal_t *journal)
err = err2;
/* Make sure all replayed data is on permanent storage */
if (journal->j_flags & JBD2_BARRIER) {
err2 = blkdev_issue_flush(journal->j_fs_dev, GFP_KERNEL, NULL);
err2 = blkdev_issue_flush(journal->j_fs_dev, GFP_KERNEL);
if (!err)
err = err2;
}

2
fs/libfs.c
View File

@ -1113,7 +1113,7 @@ int generic_file_fsync(struct file *file, loff_t start, loff_t end,
err = __generic_file_fsync(file, start, end, datasync);
if (err)
return err;
return blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
return blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL);
}
EXPORT_SYMBOL(generic_file_fsync);

2
fs/nilfs2/the_nilfs.h
View File

@ -375,7 +375,7 @@ static inline int nilfs_flush_device(struct the_nilfs *nilfs)
*/
smp_wmb();
err = blkdev_issue_flush(nilfs->ns_bdev, GFP_KERNEL, NULL);
err = blkdev_issue_flush(nilfs->ns_bdev, GFP_KERNEL);
if (err != -EIO)
err = 0;
return err;

2
fs/ocfs2/file.c
View File

@ -194,7 +194,7 @@ static int ocfs2_sync_file(struct file *file, loff_t start, loff_t end,
needs_barrier = true;
err = jbd2_complete_transaction(journal, commit_tid);
if (needs_barrier) {
ret = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
ret = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL);
if (!err)
err = ret;
}

2
fs/reiserfs/file.c
View File

@ -159,7 +159,7 @@ static int reiserfs_sync_file(struct file *filp, loff_t start, loff_t end,
barrier_done = reiserfs_commit_for_inode(inode);
reiserfs_write_unlock(inode->i_sb);
if (barrier_done != 1 && reiserfs_barrier_flush(inode->i_sb))
blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL);
inode_unlock(inode);
if (barrier_done < 0)
return barrier_done;

4
fs/super.c
View File

@ -1598,12 +1598,10 @@ int super_setup_bdi_name(struct super_block *sb, char *fmt, ...)
int err;
va_list args;
bdi = bdi_alloc(GFP_KERNEL);
bdi = bdi_alloc(NUMA_NO_NODE);
if (!bdi)
return -ENOMEM;
bdi->name = sb->s_type->name;
va_start(args, fmt);
err = bdi_register_va(bdi, fmt, args);
va_end(args);

29
fs/udf/lowlevel.c
View File

@ -27,41 +27,38 @@
unsigned int udf_get_last_session(struct super_block *sb)
{
struct cdrom_device_info *cdi = disk_to_cdi(sb->s_bdev->bd_disk);
struct cdrom_multisession ms_info;
unsigned int vol_desc_start;
struct block_device *bdev = sb->s_bdev;
int i;
vol_desc_start = 0;
if (!cdi) {
udf_debug("CDROMMULTISESSION not supported.\n");
return 0;
}
ms_info.addr_format = CDROM_LBA;
i = ioctl_by_bdev(bdev, CDROMMULTISESSION, (unsigned long)&ms_info);
if (i == 0) {
if (cdrom_multisession(cdi, &ms_info) == 0) {
udf_debug("XA disk: %s, vol_desc_start=%d\n",
ms_info.xa_flag ? "yes" : "no", ms_info.addr.lba);
if (ms_info.xa_flag) /* necessary for a valid ms_info.addr */
vol_desc_start = ms_info.addr.lba;
} else {
udf_debug("CDROMMULTISESSION not supported: rc=%d\n", i);
return ms_info.addr.lba;
}
return vol_desc_start;
return 0;
}
unsigned long udf_get_last_block(struct super_block *sb)
{
struct block_device *bdev = sb->s_bdev;
struct cdrom_device_info *cdi = disk_to_cdi(bdev->bd_disk);
unsigned long lblock = 0;
/*
* ioctl failed or returned obviously bogus value?
* The cdrom layer call failed or returned obviously bogus value?
* Try using the device size...
*/
if (ioctl_by_bdev(bdev, CDROM_LAST_WRITTEN, (unsigned long) &lblock) ||
lblock == 0)
if (!cdi || cdrom_get_last_written(cdi, &lblock) || lblock == 0)
lblock = i_size_read(bdev->bd_inode) >> sb->s_blocksize_bits;
if (lblock)
return lblock - 1;
else
return 0;
return 0;
}

2
fs/xfs/xfs_super.c
View File

@ -305,7 +305,7 @@ void
xfs_blkdev_issue_flush(
xfs_buftarg_t *buftarg)
{
blkdev_issue_flush(buftarg->bt_bdev, GFP_NOFS, NULL);
blkdev_issue_flush(buftarg->bt_bdev, GFP_NOFS);
}
STATIC void

82
fs/zonefs/super.c
View File

@ -20,6 +20,7 @@
#include <linux/mman.h>
#include <linux/sched/mm.h>
#include <linux/crc32.h>
#include <linux/task_io_accounting_ops.h>
#include "zonefs.h"
@ -477,7 +478,7 @@ static int zonefs_file_fsync(struct file *file, loff_t start, loff_t end,
if (ZONEFS_I(inode)->i_ztype == ZONEFS_ZTYPE_CNV)
ret = file_write_and_wait_range(file, start, end);
if (!ret)
ret = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
ret = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL);
if (ret)
zonefs_io_error(inode, true);
@ -595,6 +596,61 @@ static const struct iomap_dio_ops zonefs_write_dio_ops = {
.end_io = zonefs_file_write_dio_end_io,
};
static ssize_t zonefs_file_dio_append(struct kiocb *iocb, struct iov_iter *from)
{
struct inode *inode = file_inode(iocb->ki_filp);
struct zonefs_inode_info *zi = ZONEFS_I(inode);
struct block_device *bdev = inode->i_sb->s_bdev;
unsigned int max;
struct bio *bio;
ssize_t size;
int nr_pages;
ssize_t ret;
nr_pages = iov_iter_npages(from, BIO_MAX_PAGES);
if (!nr_pages)
return 0;
max = queue_max_zone_append_sectors(bdev_get_queue(bdev));
max = ALIGN_DOWN(max << SECTOR_SHIFT, inode->i_sb->s_blocksize);
iov_iter_truncate(from, max);
bio = bio_alloc_bioset(GFP_NOFS, nr_pages, &fs_bio_set);
if (!bio)
return -ENOMEM;
bio_set_dev(bio, bdev);
bio->bi_iter.bi_sector = zi->i_zsector;
bio->bi_write_hint = iocb->ki_hint;
bio->bi_ioprio = iocb->ki_ioprio;
bio->bi_opf = REQ_OP_ZONE_APPEND | REQ_SYNC | REQ_IDLE;
if (iocb->ki_flags & IOCB_DSYNC)
bio->bi_opf |= REQ_FUA;
ret = bio_iov_iter_get_pages(bio, from);
if (unlikely(ret)) {
bio_io_error(bio);
return ret;
}
size = bio->bi_iter.bi_size;
task_io_account_write(ret);
if (iocb->ki_flags & IOCB_HIPRI)
bio_set_polled(bio, iocb);
ret = submit_bio_wait(bio);
bio_put(bio);
zonefs_file_write_dio_end_io(iocb, size, ret, 0);
if (ret >= 0) {
iocb->ki_pos += size;
return size;
}
return ret;
}
/*
* Handle direct writes. For sequential zone files, this is the only possible
* write path. For these files, check that the user is issuing writes
@ -610,6 +666,8 @@ static ssize_t zonefs_file_dio_write(struct kiocb *iocb, struct iov_iter *from)
struct inode *inode = file_inode(iocb->ki_filp);
struct zonefs_inode_info *zi = ZONEFS_I(inode);
struct super_block *sb = inode->i_sb;
bool sync = is_sync_kiocb(iocb);
bool append = false;
size_t count;
ssize_t ret;
@ -618,7 +676,7 @@ static ssize_t zonefs_file_dio_write(struct kiocb *iocb, struct iov_iter *from)
* as this can cause write reordering (e.g. the first aio gets EAGAIN
* on the inode lock but the second goes through but is now unaligned).
*/
if (zi->i_ztype == ZONEFS_ZTYPE_SEQ && !is_sync_kiocb(iocb) &&
if (zi->i_ztype == ZONEFS_ZTYPE_SEQ && !sync &&
(iocb->ki_flags & IOCB_NOWAIT))
return -EOPNOTSUPP;
@ -642,16 +700,22 @@ static ssize_t zonefs_file_dio_write(struct kiocb *iocb, struct iov_iter *from)
}
/* Enforce sequential writes (append only) in sequential zones */
mutex_lock(&zi->i_truncate_mutex);
if (zi->i_ztype == ZONEFS_ZTYPE_SEQ && iocb->ki_pos != zi->i_wpoffset) {
if (zi->i_ztype == ZONEFS_ZTYPE_SEQ) {
mutex_lock(&zi->i_truncate_mutex);
if (iocb->ki_pos != zi->i_wpoffset) {
mutex_unlock(&zi->i_truncate_mutex);
ret = -EINVAL;
goto inode_unlock;
}
mutex_unlock(&zi->i_truncate_mutex);
ret = -EINVAL;
goto inode_unlock;
append = sync;
}
mutex_unlock(&zi->i_truncate_mutex);
ret = iomap_dio_rw(iocb, from, &zonefs_iomap_ops,
&zonefs_write_dio_ops, is_sync_kiocb(iocb));
if (append)
ret = zonefs_file_dio_append(iocb, from);
else
ret = iomap_dio_rw(iocb, from, &zonefs_iomap_ops,
&zonefs_write_dio_ops, sync);
if (zi->i_ztype == ZONEFS_ZTYPE_SEQ &&
(ret > 0 || ret == -EIOCBQUEUED)) {
if (ret > 0)

2
include/linux/backing-dev-defs.h
View File

@ -193,8 +193,6 @@ struct backing_dev_info {
congested_fn *congested_fn; /* Function pointer if device is md/dm */
void *congested_data; /* Pointer to aux data for congested func */
const char *name;
struct kref refcnt; /* Reference counter for the structure */
unsigned int capabilities; /* Device capabilities */
unsigned int min_ratio;

8
include/linux/backing-dev.h
View File

@ -33,14 +33,10 @@ int bdi_register(struct backing_dev_info *bdi, const char *fmt, ...);
__printf(2, 0)
int bdi_register_va(struct backing_dev_info *bdi, const char *fmt,
va_list args);
int bdi_register_owner(struct backing_dev_info *bdi, struct device *owner);
void bdi_set_owner(struct backing_dev_info *bdi, struct device *owner);
void bdi_unregister(struct backing_dev_info *bdi);
struct backing_dev_info *bdi_alloc_node(gfp_t gfp_mask, int node_id);
static inline struct backing_dev_info *bdi_alloc(gfp_t gfp_mask)
{
return bdi_alloc_node(gfp_mask, NUMA_NO_NODE);
}
struct backing_dev_info *bdi_alloc(int node_id);
void wb_start_background_writeback(struct bdi_writeback *wb);
void wb_workfn(struct work_struct *work);

Some files were not shown because too many files have changed in this diff Show More